Academic literature on the topic 'Pump and probe techniques'

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Journal articles on the topic "Pump and probe techniques"

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Yuan, Chao, Riley Hanus, and Samuel Graham. "A review of thermoreflectance techniques for characterizing wide bandgap semiconductors’ thermal properties and devices’ temperatures." Journal of Applied Physics 132, no. 22 (December 14, 2022): 220701. http://dx.doi.org/10.1063/5.0122200.

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Thermoreflectance-based techniques, such as pump–probe thermoreflectance (pump–probe TR) and thermoreflectance thermal imaging (TTI), have emerged as the powerful and versatile tools for the characterization of wide bandgap (WBG) and ultrawide bandgap (UWBG) semiconductor thermal transport properties and device temperatures, respectively. This Review begins with the basic principles and standard implementations of pump–probe TR and TTI techniques, illustrating that when analyzing WBG and UWBG materials or devices with pump–probe TR or TTI, a metal thin-film layer is often required. Due to the transparency of the semiconductor layers to light sources with sub-bandgap energies, these measurements directly on semiconductors with bandgaps larger than 3 eV remain challenging. This Review then summarizes the general applications of pump–probe TR and TTI techniques for characterizing WBG and UWBG materials and devices where thin metals are utilized, followed by introducing more advanced approaches to conventional pump–probe TR and TTI methods, which achieve the direct characterizations of thermal properties on GaN-based materials and the channel temperature on GaN-based devices without the use of thin-film metals. Discussions on these techniques show that they provide more accurate results and rapid feedback and would ideally be used as a monitoring tool during manufacturing. Finally, this Review concludes with a summary that discusses the current limitations and proposes some directions for future development.
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Nango, Eriko, Minoru Kubo, Kensuke Tono, and So Iwata. "Pump-Probe Time-Resolved Serial Femtosecond Crystallography at SACLA: Current Status and Data Collection Strategies." Applied Sciences 9, no. 24 (December 14, 2019): 5505. http://dx.doi.org/10.3390/app9245505.

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Structural information on protein dynamics is a critical factor in fully understanding the protein functions. Pump-probe time-resolved serial femtosecond crystallography (TR-SFX) is a recently established technique for visualizing the structural changes or reactions in proteins that are at work with high spatial and temporal resolution. In the pump-probe method, protein microcrystals are continuously delivered from an injector and exposed to an X-ray free-electron laser (XFEL) pulse after a trigger to initiate a reaction, such as light, chemicals, temperature, and electric field, which affords the structural snapshots of intermediates that occur in the protein. We are in the process of developing the device and techniques for pump-probe TR-SFX while using XFEL produced at SPring-8 Angstrom Compact Free-Electron Laser (SACLA). In this paper, we described our current development details and data collection strategies for the optical pump X-ray probe TR-SFX experiment at SACLA and then reported the techniques of in crystallo TR spectroscopy, which is useful in clarifying the nature of reaction that takes place in crystals in advance.
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Godfrey, T. J., Hui Yu, Michael S. Biddle, and Susanne Ullrich. "A wavelength dependent investigation of the indole photophysics via ionization and fragmentation pump–probe spectroscopies." Physical Chemistry Chemical Physics 17, no. 38 (2015): 25197–209. http://dx.doi.org/10.1039/c5cp02975a.

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Using a variety of gas-phase pump–probe spectroscopic techniques, this work investigates indole excited-state relaxation dynamics at several pump wavelengths with a particular focus on 1πσ*-state involvement.
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Schmidhammer, U., S. Roth, E. Riedle, A. A. Tishkov, and H. Mayr. "Compact laser flash photolysis techniques compatible with ultrafast pump-probe setups." Review of Scientific Instruments 76, no. 9 (September 2005): 093111. http://dx.doi.org/10.1063/1.2047828.

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Callegaro, L., and E. Puppin. "Pump and Probe Techniques for Spin–Lattice Thermalization Measurements. Thermal Requirements." physica status solidi (b) 185, no. 2 (October 1, 1994): 481–86. http://dx.doi.org/10.1002/pssb.2221850219.

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Christian, J. F., B. Broers, J. H. Hoogenraad, W. J. van der Zande, and L. D. Noordam. "Rubidium electronic wavepackets probed by a phase-sensitive pump-probe technique." Optics Communications 103, no. 1-2 (November 1993): 79–84. http://dx.doi.org/10.1016/0030-4018(93)90646-m.

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Minitti, Michael P., Joseph S. Robinson, Ryan N. Coffee, Steve Edstrom, Sasha Gilevich, James M. Glownia, Eduardo Granados, et al. "Optical laser systems at the Linac Coherent Light Source." Journal of Synchrotron Radiation 22, no. 3 (April 22, 2015): 526–31. http://dx.doi.org/10.1107/s1600577515006244.

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Ultrafast optical lasers play an essential role in exploiting the unique capabilities of recently commissioned X-ray free-electron laser facilities such as the Linac Coherent Light Source (LCLS). Pump–probe experimental techniques reveal ultrafast dynamics in atomic and molecular processes and reveal new insights in chemistry, biology, material science and high-energy-density physics. This manuscript describes the laser systems and experimental methods that enable cutting-edge optical laser/X-ray pump–probe experiments to be performed at LCLS.
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Chen Cong, Liang Pan, Hu Rong-Rong, Jia Tian-Qing, Sun Zhen-Rong, and Feng Dong-Hai. "Pump-orientation-probe technique and its applications." Acta Physica Sinica 67, no. 9 (2018): 097201. http://dx.doi.org/10.7498/aps.67.20180244.

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Zhong, Haoyuan, Changhua Bao, Tianyun Lin, Shaohua Zhou, and Shuyun Zhou. "A newly designed femtosecond KBe2BO3F2 device with pulse duration down to 55 fs for time- and angle-resolved photoemission spectroscopy." Review of Scientific Instruments 93, no. 11 (November 1, 2022): 113910. http://dx.doi.org/10.1063/5.0106864.

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Developing a widely tunable vacuum ultraviolet (VUV) source with a sub-100 fs pulse duration is critical for ultrafast pump–probe techniques such as time- and angle-resolved photoemission spectroscopy (TrARPES). While a tunable probe source with a photon energy of 5.3–7.0 eV has been recently implemented for TrARPES by using a KBe2BO3F2 (KBBF) device, the time resolution of 280–320 fs is still not ideal, which is mainly limited by the duration of the VUV probe pulse generated by the KBBF device. Here, by designing a new KBBF device, which is specially optimized for fs applications, an optimum pulse duration of 55 fs is obtained after systematic diagnostics and optimization. More importantly, a high time resolution of 81–95 fs is achieved for TrARPES measurements covering the probe photon energy range of 5.3–7.0 eV, making it particularly useful for investigating the ultrafast dynamics of quantum materials. Our work extends the application of the KBBF device to ultrafast pump–probe techniques with the advantages of both a widely tunable VUV source and ultimate time resolution.
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Glownia, James M., Karl Gumerlock, Henrik T. Lemke, Takahiro Sato, Diling Zhu, and Matthieu Chollet. "Pump–probe experimental methodology at the Linac Coherent Light Source." Journal of Synchrotron Radiation 26, no. 3 (April 26, 2019): 685–91. http://dx.doi.org/10.1107/s160057751900225x.

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Experimental methods that use free-electron laser (FEL) sources that can deliver short X-ray pulses below a 10 fs pulse duration and traditional optical lasers are ideal tools for pump–probe experiments. However, these new methods also come with a unique set of challenges, such as how to accurately determine temporal overlap between two sources at the femtosecond scale and how to correct for the pulse-to-pulse beam property fluctuations of the FEL light derived from the self-amplified spontaneous emission process. Over the past several years of performing pump–probe experiments at the Linac Coherent Light Source (LCLS), new methods and tools have been developed to improve the ways experimental timing is measured, monitored and scanned. The aim of this article is to present an overview of the most commonly used techniques at LCLS to perform pump–probe-type experiments.
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Dissertations / Theses on the topic "Pump and probe techniques"

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Griessel, Annelle. "The investigation of resveratrol with conventional and ultrafast pump-probe spectroscopy techniques." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/3098.

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Thesis (MSc (Physics))--University of Stellenbosch, 2009.
An ultrafast pump-probe spectroscopy experiment was developed in order to investigate the fast photoinduced isomerization reaction of the molecule resveratrol. Characteristics of the resveratrol molecule are discussed, including the photoisomerization reaction from trans- to cis-resveratrol. The experimental setup for the conventional spectroscopy measurement was developed and characterized in order to investigate and understand the conventional absorption and uorescence spectroscopy of resveratrol thoroughly. The absorption spectra for both trans- and cis-resveratrol, as well as the uorescence spectra were measured, discussed and explained. This therefore forms a foundation and serves as an initial step to develop a pump-probe spectroscopy experiment for resveratrol. A general overview of ultrafast pump-probe spectroscopy is presented, as well as an explanation of the nal developed experimental setup. The principles and characteristics of the chirped pulse ampli cation (CPA) femtosecond laser source and the tunable noncollinear optical parametric ampli er (NOPA) employed as the pump pulse are discussed. The process of white light continuum (WLC) generation was investigated to utilize as the ultrashort probe pulse. Two white light continuum generation experimental setups were developed and characterized for WLC generation in a transparent medium with the fundamental CPA laser light at 775 nm (in sapphire) and with the second harmonic (SH) of the CPA light at 387 nm (in quartz). A spectrometer was designed, built and characterized in conjuction with a line focus, for simultaneous measurement of the absorption in the pumped, unpumped and reference regions in the sample. In this way the photoisomerization of resveratrol could be measured with temporal resolution as a transient absorption signal. A 420 μg/ml resveratrol solution in ethanol was investigated in this pump-probe spectroscopy experiment and the results obtained are discussed accordingly.
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Nargelas, Saulius. "Investigation of carrier dynamics in InN, InGaN, and GaAsBi by optical pump-probe techniques." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20130227_085934-75237.

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The thesis is dedicated to investigation of carrier dynamics in InN, InGaN, and GaAsBi heterostructures by using light-induced transient gratings and differential transmission techniques. The experimental studies in a wide range of excess carrier densities and temperatures revealed that trap-assisted Auger recombination is the dominant recombination mechanism in MBE-grown InN layers at room temperature. Investigation of carrier dynamics in In-rich InGaN alloys revealed that density of fast nonradiative recombination centers increases with Ga content. The correlation between excess carrier lifetime and diffusion coefficient in MOCVD-grown single InGaN layer with 13% In is governed by diffusive flow to the extended defects. Investigations of carrier lifetime and diffusivity dependence on excitation fluence indicated that both nonradiative and radiative recombination contribute to an increase of excess carrier recombination rate at high photo-excitation levels in MOCVD-grown InGaN multiple quantum wells. Transient grating measurements in MBE-grown GaAsBi layers with different Bi content revealed that Bi induced potential fluctuations determine the tenfold decrease in nonequilibrium hole mobility, if compare to GaAs.
Disertacija skirta nepusiausvirųjų krūvininkų dinamikos tyrimams InN, InGaN ir GaAsBi heterosandarose naudojant šviesa indukuotų dinaminių gardelių ir skirtuminio pralaidumo metodikas. Atlikti tyrimai plačiame nepusiausvirųjų krūvininkų tankių ir bandinio temperatūrų intervale parodė, kad krūvininkų rekombinacijos sparta MBE būdu užaugintuose InN sluoksniuose dominuojantis rekombinacijos mechanizmas kambario temperatūroje yra gaudyklių įtakota Ožė rekombinacija. Nustatyta koreliacija tarp krūvininkų gyvavimo trukmės ir difuzijos koeficiento MOCVD būdu užaugintame InGaN sluoksnyje su 13% In parodė, kad krūvininkų gyvavimo trukmę lemia difuzinė jų perneša link rekobinacijos centrų. Parodoma, kad MBE metodu užaugintuose InGaN sluoksniuose su dideliu In kiekiu (x>0,7) didėjant Ga kiekiui didėja nespindulinės rekombinacijos centrų tankis, o krūvininkų rekombinacijos sparta yra termiškai aktyvuojama. MOCVD metodu užaugintose InGaN kvantinėse sandarose dinaminių gardelių tyrimais parodoma, kad spartėjančią krūvininkų rekombinaciją didėjant sužadinimo intensyvumui lemia ne tik spindulinė rekombinacija, tačiau reikia atsižvelgti ir į nespindulinės rekombinacijos spartėjimą. Nustatyta, kad į GaAs įterpiant Bi atomus daugiau nei dešimt kartų sumažėja skylių judris dėl Bi atomų kuriamų valentinės juostos fliuktuacijų.
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Lakehal, Massil. "Out of Equilibrium Lattice Dynamics in Pump Probe Setups." Thesis, Université de Paris (2019-....), 2020. http://www.theses.fr/2020UNIP7039.

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L'étude de la dynamique hors équilibre des systèmes fortement corrélés, à l'aide de laser femtoseconde, a révélé une variété de phénomènes sans analogue en physique d'équilibre. Dans cette thèse, nous étudions théoriquement la dynamique hors équilibre des degrés de liberté du réseau et leur signature en spectroscopie pompe-sonde. Nous développons une description microscopique des phonons cohérents displacive excité par le laser. La théorie capture la rétroaction de l'excitation des phonons sur le fluide électronique, qui manque dans la formulation phénoménologique actuelle. Nous montrons que cette rétroaction conduit à une oscillation avec une fréquence qui dépend du temps aux temps courts, même si le mouvement des phonons est harmonique. Pour les temps longs, cette rétroaction apparaît comme une phase résiduelle dans le signal oscillatoire. Nous appliquons la théorie au BaFe2As2, nous expliquons l'origine de la phase du signal oscillatoire rapporté dans des expériences récentes, et nous prédisons que le système oscille avec une fréquence décalé vers le rouge pour les grandes fluences. Notre théorie ouvre également la possibilité d'extraire des informations d'équilibre à partir la dynamique des phonons cohérents. Un autre phénomène intéressant qui a été observé en spectroscopie pompe-sonde est l'oscillation des fluctuations du réseau au double de la fréquence d’un phonon du système étudié. Ces oscillations sont interprétées comme une signature d'états de phonons squeezé macroscopique. Dans ce travail, nous identifions d'autres mécanismes d'oscillations à une fréquence double autre que le squeezing. Nous montrons qu'un quench de la température du bain thermique induite par la pompe, à laquelle le phonon est couplé, ou l'excitation d'un phonon cohérent pour lequel l'anharmonicité cubique est permise par symétrie peut également produire de telles oscillations en spectroscopie sans que le phonon soit dans un état squeezé. Nous concluons que, contrairement à ce qui est communément admis, les oscillations à double fréquence phononique en spectroscopie de bruit ne sont pas nécessairement une signature des phonons squeezés. Nous soulignons ce qui peut être un critère fiable pour identifier un phonon squeezé en utilisant la spectroscopie pompe-sonde
The study of the out of equilibrium dynamics of strongly correlated systems, using ultrafast pulses, uncovered a plethora of phenomena with no analog in equilibrium physics. In this thesis, we theoretically investigate the out of equilibrium dynamics of the lattice degrees of freedom and their signature in pump-probe spectroscopy. We develop a Hamiltonian-based microscopic description of laser pump induced displacive coherent phonons. The theory captures the feedback of the phonon excitation upon the electronic fluid, which is missing in the state-of-the-art phenomenological formulation. We show that this feedback leads to chirping at short timescales, even if the phonon motion is harmonic. At long times, this feedback appears as a finite phase in the oscillatory signal. We apply the theory to BaFe2As2, explain the origin of the phase in the oscillatory signal reported in recent experiments, and we predict that the system will exhibit redshifted chirping at larger fluence. Our theory also opens the possibility to extract equilibrium information from coherent phonon dynamics. Another interesting phenomenon that have been reported in pump-probe spectroscopy is the oscillation of the lattice fluctuations at double phonon frequency. These oscillations are invariably interpreted as a signature of macroscopic squeezed phonon states. In this work, we identify other mechanisms of double phonon frequency oscillations that do not involve squeezing. We show that a pump induced temperature quench of the bath, to which the phonon is coupled to, or exciting a coherent phonon for which cubic anharmonicity is allowed by symmetry can also produce such oscillations in noise spectroscopy without squeezing the phonon state. We conclude that, in contrast with what is commonly believed, double phonon frequency oscillations in noise spectroscopy are not necessarily a signature of macroscopic phonon squeezing. We point out what can be a reliable criterion to identify a squeezed phonon using pump-probe spectroscopy
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隼人, 市橋, and Hayato Ichihashi. "Studies on optical spectroscopy techniques with surface plasmon resonance." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13127436/?lang=0, 2020. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13127436/?lang=0.

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表面プラズモン共鳴型超音波センサは高分解能な光音響顕微鏡用超音波受波器として期待されている.本研究では,サブナノ秒パルスレーザを利用したポンププローブシステムを構築してサブナノ秒域における表面プラズモン共鳴センサの熱・弾性的な過渡応答を光学的に評価した。特にプローブ光の反射率変化として観測される過渡応答の発生メカニズムについて,実験と理論の両方のアプローチから検討しており,観測される過渡応答は金属薄膜のプラズマ周波数の変化に起因することを明らかにした。
Surface plasmon resonance (SPR) sensor has been expected as a ultrasonic sensor used in high resolution photoacoustic microscopy (PAM). In this thesis, thermoelastic transient responses in SPR sensor were evaluated by a pump probe system with a developed sub-nanosecond pulsed laser. Especially, the mechanism of the transient response to be observed as a reflectivity change of the probe light was studied by two approaches of the experiment and the theoretical estimation. As consequence of these approaches, it was revealed that the transient response was caused by the change of the plasma frequency in a thin metal film of SPR sensor.
博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
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Wald, Hagen. "Ultrafast carrier dynamics investigated by a novel pump and probe terahertz technique." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=971803943.

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Lozan, Olga. "Surface plasmons and hot electrons imaging with femtosecond pump-probe thermoreflectance." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0021/document.

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Ce travail est consacré à l’étude de la dynamique ultrarapide d’électrons chauds photo-excité dans des structures plasmonique. L’intérêt particulier de ce domaine réside dans le fait que les SPs, en raison de leurs caractéristiques spatio-temporelles spécifique, offrent un nouvel attrait technologique pour les processus de transport d’information ultra-rapide aux nano-échelles. Dans ce contexte, ce manuscrit offre une compréhension et une exploitation de l’une des principales limitations des technologies à base de SP : les pertes par effet Joule. Nous exploitons le fait que le mécanisme d’absorption des plasmons dans les métaux est suivi par la génération d’électrons chauds à l’échelle femtoseconde, ainsi les pertes peuvent être considrées comme une conversion d’énergie plasmon-électrons chauds. Cette conversion d’énergie est mesurée à l’aide d’une technique pompe-sonde laser femtoseconde. Nous lançons des impulsions SP que nous sondons sur des centaines de femtosecondes grace aux variations de permittivité diélectrique induites par le gaz d’électrons chaud accompagnant la propagation de SP. Le profil de température électronique est par conséquent une image de la distribution de densité de puissance de plasmon (absorption) non élargi spatialement et temporellement par diffusion de porteurs d’énergie. Nous avons pu démontrer la capacité de relier la mesure de température électronique à l’absorption du SP, révélant une absorption anormale autour d’une fente nanométrique. Les résultats expérimentaux sont en accord quantitatif avec les prédictions théoriques de la distribution de densité de puissance. Dans une seconde partie, nous avons étudié les pertes plasmoniques et leurs caractéristiques lors de sa propagation sur un film métallique semi-infini. Nous avons déterminé la vitesse de l’onde thermique électronique et son atténuation. Dans la dernière partie, nous utilisons une structure en pointe pour guider adiabatiquement et focaliser le plasmon à l’extrémité. Nous avons démontré ainsi la génération d’un point chaud nanométrique et avons mis en évidence un retard dans l’échauffement des électrons à l’extrémité de la pointe. Les perspectives et les questions ouvertes sont également discutées
In this work we explored the ultrafast dynamics of photo-excited hot electrons in plasmonic structures. The particular interest of this field resides on the fact surface plasmons (SP), because of their unrivaled temporal and spatial characteristics, provide a technological route for ultrafast information processes at the nanoscale. In this context, this manuscript provides a comprehension and the harnessing of one of the major limitation of the SP-based technologies : absorption losses by Joule heating. We exploit the fact that the mechanism of plasmon absorption in metals is followed by generation of hot electrons at femtosecond time scale, thus losses can be seen as a plasmon-to-hot-electron energy conversion. This energy conversion is measured with femtosecond pump-probe technique. Femtosecond SP pulses are launched and probed over hundred femtoseconds through the permittivity variations induced by the hot-electron gas and which accompany the SP propagation. The measured electron temperature profile is therefore an image of plasmon power density distribution (absorption) not broadened spatially and temporally by energy carrier diffusion. As an important result we demonstrated the capability to link the electronic temperature measurement to the plasmonic absorption, revealing an anomalous light absorption for a sub- slit surroundings, in quantitative agreement with predictions of the power density distribution. In a second part we studied plasmon losses and their characteristics when they propagate on semi-infinite metal film. We determined the electronic thermal wave velocity and damping. In the last part we used a focusing taper-structure to adiabatically guide and focus the plasmon at the apex. Was demonstrated the generation of a nanoscale hot spot and put in evidence a delayed electron heating at the taper apex. Perspectives and the remaining open questions are also discussed
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Titimbo, Chaparro Kelvin Ruben. "CREATION AND DETECTION OF SQUEEZED PHONONS IN PUMP AND PROBE EXPERIMENTS: A FULLY QUANTUM TREATMENT." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10941.

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2013/2014
Femtosecond pump and probe techniques are standard experimental methodologies used for studying ultrafast dynamics in solids, in particular phonon oscillations in target materials. So far, only semiclassical methods have been employed in order to theoretically interpret the experimental data. In contrast, a fully quantum treatment will be presented here taking into account the quantum features of the generation mechanism of excited phonons by pump laser pulses, and of the process of accessing their behaviour by probe laser pulses. A single effective Hamiltonian will be used to model the interaction between photons and phonons both for the pumping and probing processes. In addition, as they interact with their environment, mainly electrons in the target, the excited phonons cannot be considered an isolated system. Their dynamics is then that typical of open quantum systems and generated by a master equation of Lindblad form, that takes into account the dissipative and noisy effects due to the environment.In this formalism, phonon oscillations can be analysed through suitable probe photon observables. Specifically, unlike in the existing literature, we will not focus only upon the scattered probe pulse intensity, namely on the probe photon number, but also on the number variance. Through the latter some quantum features of the phonon state can be accessed; in particular, specific signals of the presence of squeezed phonons can thus be identified.
Le tecniche di "pump and probe" impulsato sono metodologie sperimentali standard usate nello studio delle dinamiche ultraveloci nei solidi, in particolare delle oscillazioni di fononi. Usualmente l'interpretazione teorica dei dati sperimentali si basa su approssimazioni semiclassiche. Una descrizione completamente quantistica e` invece sviluppata nella presente trattazione: e` basata sull'introduzione di un'unica hamiltoniana di interazione tra fotoni e fononi, capace di descrivere in modo effettivo sia il processo di eccitazione che di rivelazione dei fononi. In generale, tali fononi non possono essere considerati come isolati, ma costituiscono un sistema quantistico aperto, cioe` in interazione debole con l'ambiente esterno, formato principalmente da elettroni e dagli altri costituenti del materiale in studio. La loro dinamica deve percio` venir descritta tramite una equazione master, che tenga conto di effetti di rumore e dissipazione. In questo formalismo, le proprieta` dei fononi eccitati dagli impulsi laser di "pump" possono essere analizzate attraverso lo studio di opportune osservabili caratterizzanti i fotoni di "probe". Piu` specificatamente, si e` analizzato il comportamento non solo dell'intensita` media della luce di "probe" riflessa, cioe` del numero medio di fotoni, ma anche della relativa varianza. In questo modo, si possono evidenziare alcune caratteristiche quantistiche dei fononi: in particolare, sono stati individuati segnali specifici della presenza di fononi "squeezed"
XXVII Ciclo
1986
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Liu, Yingliang. "Structural Dynamics of DNA Hydration Shell Studied by 2D IR and Pump-Probe Technique." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18559.

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Biochemische Prozesse treten in wässriger Umgebung auf und Wechselwirkungen der Wasserhülle mit Biomolekülen spielt eine Schlüsselrolle für deren Struktur und Funktion. In dieser Arbeit wird die Strukturdynamik der Wassermoleküle und Gegenionen in der umgebenden Wasserhülle der DNA mit der Methode der zweidimensionalen Infrarotspektroskopie (2D IR) sowie Anrege-Abfrage-Spektroskopie untersucht. Die Ergebnisse der vorliegenden Arbeit zeigt das starke Potenzial von Schwingungsmoden an Grenzflächen für die Abbildung und das Verständnis von Wechselwirkungen zwischen Biomolekülen und ihrer Wasserhülle. In Zukunft soll dieses Konzept auch auf andere Biomoleküle angewendet werden.
Biochemical processes occur in an aqueous environment and interactions of the water shell with biomolecules play a key role for their structure and function. In this thesis, the structural dynamics of water molecules and counterions in the hydration shell of DNA is investigated by two-dimensional infrared (2D IR) spectroscopy and pump-probe transient spectroscopy. 2D IR spectroscopy is a powerful technique that can track molecular couplings between different vibrational modes and structural fluctuations of the chemical environment on a femto- to picosecond time scale. In the present study, vibrational modes of the DNA backbone serve as probes located at the DNA-water interface. The results of this thesis demonstrate the strong potential of interfacial vibrational modes for mapping and understanding interactions between biomolecules and their water shell. In future, this concept will be applied to other biomolecular systems.
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ARESTI, MAURO. "Ultrafast Optical Spectroscopy Techniques applied to colloidal nanocrystals." Doctoral thesis, Università degli Studi di Cagliari, 2014. http://hdl.handle.net/11584/266450.

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In this thesis I will describe my experimental work based on ultrafast optical spectroscopy techniques applied to colloidal nanocrystals. Colloidal semiconductor nanocrystals in recent years have attracted a lot of attention in particular in optoelectronic applications, because they present unique optical, electronic and charge carrier transport properties that can be easily modified via colloidal chemical synthesis. In the first chapter of this thesis, I will introduce the basic concepts of nanocrystals and their optical properties, I will consider some simple models to explain the physical properties of semiconductor nanocrystals. I will briefly describe the colloidal chemical synthesis of these nanocrystals and how we can change the optical properties by simply acting on the colloidal chemical synthesis. In the second chapter I will describe the basic concepts of ultra fast optical spectroscopy techniques used in my experimental work. I will describe the basic principles and the experimental set-up of the two main techniques that I used: time-resolved photoluminescence spectroscopy (TR-PL) and transient absorption spectroscopy or also called Pump Probe. These two techniques allow to investigate in a very precise way the main optical properties and dynamics of charge carriers in nanocrystals. In the third chapter I will describe my experimental work based on timeresolved photoluminescence spectroscopy applied to CdSe=CdS core=shell nanocrystals. These nanocrystals are a reference nanocrystals and their optical properties are extensively investigated, however, some aspects are not fully understood, for example, the instability or blinking of the light emission under constant illumination in these nanocrystals is still an unsolved problem that limits the real applications. The particular spectroscopic technique that I have used variable pulse rate photoluminescence spectroscopy revealed the causes of this issue, and will give us a solution to resolve it. In the fourth chapter I will discuss novel nanostructures of CdSe=CdS multi branched shape, in this case octapod shaped nanocrystals consist of eight arms made of CdS grown on a CdSe core, these present a large crosssection for light absorption and efficient charge separation ideally suited for applications of photocatalysis. The optical spectroscopy technique used to investigate the properties of these nanocrystals are the transient absorption spectroscopy. In the fifth chapter I will discuss experimental work on Bi2S3 semiconductor nanocrystals and I will describe related optical techniques used to study the optical and electronic properties. This nanocrystal has excellent properties of optical absorption of solar radiation and can be used for the realization of solar cells. Another important property of Bi2S3 is its nontoxicity that will allow in the future to achieve efficient solar cells and easy disposal and simultaneously not damaging to the environment.
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Giese, Christian [Verfasser], and Frank [Akademischer Betreuer] Stienkemeier. "Vibrational structure and dynamics of triatomic alkali molecules and RbHe exciplexes on helium nanodroplets investigated with femtosecond and picosecond pump-probe techniques = Vibrationsstruktur und Dynamik von dreiatomigen Alkalimolekülen und RbHe Exziplexen auf Helium Nanotröpfchen, untersucht mit Femtosekunden und Picosekunden Pump-Probe Techniken." Freiburg : Universität, 2012. http://d-nb.info/1123469385/34.

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Books on the topic "Pump and probe techniques"

1

J, Kricka L., ed. Nonisotopic DNA probe techniques. San Diego: Academic Press, 1992.

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1947-, Kricka Larry J., ed. Nonisotopic DNA probe techniques. San Diego: Academic Press, 1992.

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Schnorr, Kirsten. XUV Pump-Probe Experiments on Diatomic Molecules. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-12139-0.

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1949-, Bhushan Bharat, Fuchs H, and Tomitori M, eds. Applied scanning probe methods VIII: Scanning probe microscopy techniques. Berlin: Springer, 2008.

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1949-, Bhushan Bharat, Fuchs H, and Kawata Satoshi 1966-, eds. Applied scanning probe methods V: Scanning probe microscopy techniques. Berlin: Springer, 2007.

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1949-, Bhushan Bharat, Fuchs H, and Kawata Satoshi 1966-, eds. Applied scanning probe methods V: Scanning probe microscopy techniques. Berlin: Springer, 2007.

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1949-, Bhushan Bharat, and Fuchs H. O. 1907-, eds. Applied scanning probe methods II: Scanning probe microscopy techniques. Berlin: Springer, 2005.

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1949-, Bhushan Bharat, Fuchs H, and Kawata Satoshi 1966-, eds. Applied scanning probe methods V: Scanning probe microscopy techniques. Berlin: Springer, 2007.

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1945-, Avouris Phaedon, Bimberg Dieter, Fuchs Harald, Klitzing Klaus von, Sakaki Hiroyuki 1944-, Wiesendanger R. (Roland) 1961-, and SpringerLink (Online service), eds. Applied Scanning Probe Methods XI: Scanning Probe Microscopy Techniques. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009.

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R, Oltra, European Federation of Corrosion, and Institute of Materials, Minerals, and Mining., eds. Local probe techniques for corrosion research. Cambridge: Woodhead for European Federation of Corrosion on behalf of Institute of Materials, Minerals & Mining, 2007.

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Book chapters on the topic "Pump and probe techniques"

1

Yokoyama, Toshihiko, and Yohei Uemura. "Pump Probe XAFS." In XAFS Techniques for Catalysts, Nanomaterials, and Surfaces, 127–32. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43866-5_9.

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Schöffler, M. S., L. Ph H. Schmidt, S. Eckart, R. Dörner, A. Czasch, O. Jagutzki, T. Jahnke, et al. "Ultra-fast Dynamics in Quantum Systems Revealed by Particle Motion as Clock." In Molecular Beams in Physics and Chemistry, 353–73. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63963-1_17.

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AbstractTo explore ultra-fast dynamics in quantum systems one needs detection schemes which allow time measurements in the attosecond regime. During the recent decades, the pump & probe two-pulse laser technique has provided milestone results on ultra-fast dynamics with femto- and attosecond time resolution. Today this technique is applied in many laboratories around the globe, since complete pump & probe systems are commercially available. It is, however, less known or even forgotten that ultra-fast dynamics has been investigated several decades earlier even with zeptosecond resolution in ion-atom collision processes. A few of such historic experiments, are presented here, where the particle motion (due to its very fast velocity) was used as chronometer to determine ultra-short time delays in quantum reaction processes. Finally, an outlook is given when in near future relativistic heavy ion beams are available which allow a novel kind of “pump & probe” experiments on molecular systems with a few zeptosecond resolution. However, such experiments are only feasible if the complete many-particle fragmentation process can be imaged with high momentum resolution by state-of-the-art multi-particle coincidence technique.
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Hase, Muneaki, Paul Fons, Kirill Mitrofanov, Alexander V. Kolobov, and Junji Tominaga. "Ultrafast Lattice Dynamics of Phase-Change Materials Monitored by a Pump-Pump-Probe Technique." In Springer Proceedings in Physics, 210–13. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13242-6_50.

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Zhao, Jin-yu, Min Qu, Jia-huang Li, Zheng Zhang, Shu-yi Zhang, Yue-tao Yang, and Zi-chun Hua. "Quantum Yields in Photolyses of Mammalian Carboxy-Hemoglobin Studied by Pulsed Laser Pump-Probe Technique." In Advances in Intelligent and Soft Computing, 849–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27537-1_100.

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Wessels, Philipp, and Markus Drescher. "Picosecond Magnetization Dynamics of Nanostructures Imaged with Pump–Probe Techniques in the Visible and Soft X-Ray Spectral Range." In Atomic- and Nanoscale Magnetism, 285–98. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99558-8_14.

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Kunitski, Maksim. "Small Helium Clusters Studied by Coulomb Explosion Imaging." In Topics in Applied Physics, 41–66. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94896-2_2.

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AbstractSmall helium clusters consisting of two and three helium atoms are unique quantum systems in several aspects. The helium dimer has a single weakly bound state and is of huge spatial extent, such that most of its probability distribution resides outside the potential well in the classically forbidden tunnelling region. The helium trimer possesses only two vibrational states, one of which is of Efimov nature. In this chapter, we discuss application of the Coulomb explosion imaging technique for studying geometries and binding energies of these peculiar two- and three-body quantum systems. Irradiation of a helium cluster by a strong laser field allows tuning interactions between helium atoms. Such ultrashort interaction modification induces response dynamics in a cluster that is observed by combination of the imaging technique with the pump-probe approach.
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Mizoguchi, K., M. Hase, S. Nakashima, and M. Nakayama. "Study of coherent folded acoustic phonons in GaAs/AlAs superlattices by two-color pump-probe technique." In Springer Series in Chemical Physics, 269–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-72289-9_81.

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Olson, R. J., A. M. Chekalyuk, H. M. Sosik, and M. Yu Gorbunov. "Pump-During-Probe Technique for Measuring Photosynthetic Characteristics of Individual Algal Cells Using Flow Cytometry and Microfluorometry." In Photosynthesis: from Light to Biosphere, 4635–40. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0173-5_1087.

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Röhm, André. "Pump-Probe Experiments." In Dynamic Scenarios in Two-State Quantum Dot Lasers, 76–85. Wiesbaden: Springer Fachmedien Wiesbaden, 2015. http://dx.doi.org/10.1007/978-3-658-09402-7_6.

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De Giovannini, Umberto. "Pump-Probe Photoelectron Spectra." In Handbook of Materials Modeling, 293–311. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-44677-6_5.

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Conference papers on the topic "Pump and probe techniques"

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Fischer, Martin C., Jesse Wilson, Mary Jane Simpson, Baolei Li, Francisco Robles, Kevin Claytor, and Warren S. Warren. "Nonlinear Pump-Probe Techniques for Multi-Contrast Microscopy." In Novel Techniques in Microscopy. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/ntm.2013.nt1b.1.

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Matthews, Thomas E., Ivan Piletic, Maria A. Selim, Mary Jane Simpson, and Warren S. Warren. "Beyond Pathology: Pump-Probe Imaging of Skin Slices Provides Additional Indicators of Melanoma." In Novel Techniques in Microscopy. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/ntm.2011.nmd4.

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Duer, R., D. Gershoni, I. Shtrichman, and E. Ehrenfreund. "Superlattice Exciton Dynamics Probed by a Novel Interband-Pump Intersubband-Probe Technique." In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.tue.48.

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We present a conclusive study of the dynamics of excitons in photoexcited GaAs/GaAlAs quantum wells, using a novel interband-pump intersubband-probe technique. This technique probes the mid IR absorption due to optical transitions of carriers between their subbands, following photogeneration by a picosecond interband pulse.
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Hopkins, Patrick E., Justin R. Serrano, and Leslie M. Phinney. "Thermal Models for Determining Thermal Conductivity and Thermal Boundary Conductance Using Pump-Probe Thermoreflectance Techniques." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88269.

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Pump-probe transient thermoreflectance (TTR) techniques are powerful tools for measuring thermophysical properties of thin films, such as thermal conductivity, Λ, or thermal boundary conductance, G. TTR experimental setups rely on lock-in techniques to detect the response of the probe signal relative to the pump heating event. The temporal decays of the lock-in signal are then compared to thermal models to deduce the Λ and G in and across various materials. There are currently two thermal models that are used to relate the measured signals from the lock-in to the Λ and G in the sample of interest. In this work, the thermal models, their assumptions, and their ranges of applicability are compared. The advantages and disadvantages of each technique are elucidated from the results of the thermophysical property measurements.
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Yodh, Arjun G. "High-repetition-rate techniques for ultrafast pump-probe spectroscopy in the mid-infrared." In OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, edited by Timothy R. Gosnell, Antoinette J. Taylor, Keith A. Nelson, and Michael C. Downer. SPIE, 1993. http://dx.doi.org/10.1117/12.147040.

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Chen, T., H. Dietz, V. Engel, M. Heid, Wolfgang Kiefer, G. Knopp, A. Materny, et al. "Femtosecond spectroscopy on simple molecular systems: pump-probe and four-wave mixing techniques." In ICONO '98: Laser Spectroscopy and Optical Diagnostics--Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, edited by Sergei S. Chesnokov, Valerii P. Kandidov, and Nikolai I. Koroteev. SPIE, 1999. http://dx.doi.org/10.1117/12.340043.

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Dirisaglik, Faruk, Gokhan Bakan, Sadid Muneer, Nicholas Williams, Mustafa Akbulut, Helena Silva, and Ali Gokirmak. "Electrical pump-probe characterization technique for phase change materials." In 2016 74th Annual Device Research Conference (DRC). IEEE, 2016. http://dx.doi.org/10.1109/drc.2016.7548508.

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Gancheryonok, Igor I., Yasuo Kanematsu, and Takashi Kushida. "New Spectroscopic Techniques on the Basis of Elliptically Polarized Pumping." In High Resolution Spectroscopy. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/hrs.1993.wb6.

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When rather high-power polarized radiation (pump) propagates in an isotropic medium, an induced anisotropy may arise due to the nonlinear character of the interaction. This anisotropy can significantly affect the polarization of the probe field as well as its intensity. The cited effect lies in the basis of nonlinear polarization spectroscopy(NPS) and optically heterodyned polarization spectroscopy(OHPS). Usually the pump beam has linear or circular polarization and the probe one is linearly polarized. More general case occurs when pumping has elliptical polarization. In this paper we show how additional "degree of freedom"(pump ellipticity) of such a type of excitation can be advantageously applied to the investigation of initially isotropic substances.
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Hase, Muneaki, Paul Fons, Kirill Mitrofanov, Alexander V. Kolobov, and Junji Tominaga. "Ultrafast Lattice Dynamics of Phase-change Materials Monitored by a Pump-pump-probe Technique." In International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/up.2014.08.tue.p2.43.

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Herzog, Marc, Roman Shayduk, Wolfram Leitenberger, R. M. van der Veen, C. J. Milne, S. L. Johnson, I. Vrejoiu, M. Alexe, D. Hesse, and Matias Bargheer. "Coherent Phonons in Oxide Superlattices observed by optical and X-ray Pump-Probe Techniques." In International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/up.2010.tue50.

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Reports on the topic "Pump and probe techniques"

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Wysong, Ingrid J. Measurement of Quenching Rates of CO(a sup 3Pi, v=0) Using Laser Pump-and-Probe Technique. Fort Belvoir, VA: Defense Technical Information Center, November 1999. http://dx.doi.org/10.21236/ada409111.

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Larsson, J., E. Judd, and P. J. Schuck. Ultrafast laser pump/x-ray probe experiments. Office of Scientific and Technical Information (OSTI), April 1997. http://dx.doi.org/10.2172/603701.

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Lai, Chen Yen. Pump probe phenomena in strongly correlated systems. Office of Scientific and Technical Information (OSTI), February 2020. http://dx.doi.org/10.2172/1601609.

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Perkins, Cara P. Improving Phase Measurement Procedures for Pump-Probe Experiments. Office of Scientific and Technical Information (OSTI), June 2011. http://dx.doi.org/10.2172/1017217.

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Segre, Gino P. Pump probe spectroscopy of quasiparticle dynamics in cuprate superconductors. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/787131.

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Search, C. P., and P. R. Berman. Recoil-Induced-Resonances in Nonlinear, Ground-State, Pump-Probe Spectroscopy. Fort Belvoir, VA: Defense Technical Information Center, March 2001. http://dx.doi.org/10.21236/ada414457.

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Prasankumar, Rohit. Using femtosecond pump-probe spectroscopy to shed new light on complex materials. Office of Scientific and Technical Information (OSTI), September 2021. http://dx.doi.org/10.2172/1821354.

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Goebel, D. M., G. A. Campbell, R. W. Conn, W. K. Leung, K. H. Dippel, K. H. Finken, G. J. Thomas, and A. E. Pontau. Langmuir probe measurements in the TEXTOR tokamak during ALT-I pump limiter experiments. Office of Scientific and Technical Information (OSTI), April 1986. http://dx.doi.org/10.2172/5224011.

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Buck, D. R. Theoretical Simulations and Ultrafast Pump-probe Spectroscopy Experiments in Pigment-protein Photosynthetic Complexes. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/764683.

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Spoth, Katherine. X-Ray Emission Spectrometer Design with Single-Shot Pump-Probe and Resonant Excitation Capabilities. Office of Scientific and Technical Information (OSTI), August 2012. http://dx.doi.org/10.2172/1049736.

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