Bibliografie tematiche / Vibrational strong coupling

Letteratura scientifica selezionata sul tema "Vibrational strong coupling"

Autore: Grafiati
Pubblicato: 20 luglio 2024

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Articoli di riviste sul tema "Vibrational strong coupling"

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De Sio, Antonietta, Xuan Trung Nguyen e Christoph Lienau. "Signatures of Strong Vibronic Coupling Mediating Coherent Charge Transfer in Two-Dimensional Electronic Spectroscopy". Zeitschrift für Naturforschung A 74, n. 8 (27 agosto 2019): 721–37. http://dx.doi.org/10.1515/zna-2019-0150.

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AbstractThe role of molecular vibrations for the persistence of quantum coherences, recently observed in photoinduced charge transfer reactions in both biological and artificial energy conversion systems at room temperature, is currently being intensely discussed. Experiments using two-dimensional electronic spectroscopy (2DES) suggest that vibrational motion – and its coupling to electronic degrees of freedom – may play a key role for such coherent dynamics and potentially even for device function. In organic photovoltaics materials, strong coupling of electronic and vibrational motion is predicted, especially for ubiquitous C=C stretching vibrations. The signatures of such strong vibronic couplings in 2DES are, however, debated. Here we analyse the effect of strong vibronic coupling in model simulations of 2DES spectra and dynamics for an electronic dimer coupled to a single high-frequency vibrational mode. This system represents the simplest conceivable model for a prototypical donor–acceptor interface in the active layer of organic solar cells. The vibrational mode is chosen to mimic C=C stretching vibrations with typical large vibronic couplings predicted in organic photovoltaics materials. Our results show that the decisive signatures of strong vibronic coupling mediating coherent charge transfer between donor and acceptor are not only temporally oscillating cross-peaks, but also most importantly characteristic peak splittings in the 2DES spectra. The 2DES pattern thus directly reflects the new eigenstates of the system that are formed by strong mixing of electronic states and vibrational mode.
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Nagarajan, Kalaivanan, Anoop Thomas e Thomas W. Ebbesen. "Chemistry under Vibrational Strong Coupling". Journal of the American Chemical Society 143, n. 41 (5 ottobre 2021): 16877–89. http://dx.doi.org/10.1021/jacs.1c07420.

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George, Jino, Atef Shalabney, James A. Hutchison, Cyriaque Genet e Thomas W. Ebbesen. "Liquid-Phase Vibrational Strong Coupling". Journal of Physical Chemistry Letters 6, n. 6 (9 marzo 2015): 1027–31. http://dx.doi.org/10.1021/acs.jpclett.5b00204.

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McConnell, Conor, e Ahsan Nazir. "Strong coupling in thermoelectric nanojunctions: a reaction coordinate framework". New Journal of Physics 24, n. 2 (1 febbraio 2022): 025002. http://dx.doi.org/10.1088/1367-2630/ac4ce3.

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Abstract We study a model of a thermoelectric nanojunction driven by vibrationally-assisted tunnelling. We apply the reaction coordinate formalism to derive a master equation governing its thermoelectric performance beyond the weak electron-vibrational coupling limit. Employing full counting statistics we calculate the current flow, thermopower, associated noise, and efficiency without resorting to the weak vibrational coupling approximation. We demonstrate intricacies of the power-efficiency-precision trade-off at strong coupling, showing that the three cannot be maximised simultaneously in our model. Finally, we emphasise the importance of capturing non-additivity when considering strong coupling and multiple environments, demonstrating that an additive treatment of the environments can violate the upper bound on thermoelectric efficiency imposed by Carnot.
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Casey, Shaelyn R., e Justin R. Sparks. "Vibrational Strong Coupling of Organometallic Complexes". Journal of Physical Chemistry C 120, n. 49 (7 dicembre 2016): 28138–43. http://dx.doi.org/10.1021/acs.jpcc.6b10493.

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Wang, Derek S., Johannes Flick e Susanne F. Yelin. "Chemical reactivity under collective vibrational strong coupling". Journal of Chemical Physics 157, n. 22 (14 dicembre 2022): 224304. http://dx.doi.org/10.1063/5.0124551.

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Recent experiments of chemical reactions in optical cavities have shown great promise to alter and steer chemical reactions, but still remain poorly understood theoretically. In particular, the origin of resonant effects between the cavity and certain vibrational modes in the collective limit is still subject to active research. In this paper, we study the unimolecular dissociation reactions of many molecules, collectively interacting with an infrared cavity mode, through their vibrational dipole moment. We find that the reaction rate can slow down by increasing the number of aligned molecules, if the cavity mode is resonant with a vibrational mode of the molecules. We also discover a simple scaling relation that scales with the collective Rabi splitting, to estimate the onset of reaction rate modification by collective vibrational strong coupling and numerically demonstrate these effects for up to 104 molecules.
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Cohn, Bar, Kamalika Das, Arghyadeep Basu e Lev Chuntonov. "Infrared Open Cavities for Strong Vibrational Coupling". Journal of Physical Chemistry Letters 12, n. 29 (22 luglio 2021): 7060–66. http://dx.doi.org/10.1021/acs.jpclett.1c01438.

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Imran, Iffat, Giulia E. Nicolai, Nicholas D. Stavinski e Justin R. Sparks. "Tuning Vibrational Strong Coupling with Co-Resonators". ACS Photonics 6, n. 10 (13 settembre 2019): 2405–12. http://dx.doi.org/10.1021/acsphotonics.9b01040.

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Vergauwe, Robrecht M. A., Jino George, Thibault Chervy, James A. Hutchison, Atef Shalabney, Vladimir Y. Torbeev e Thomas W. Ebbesen. "Quantum Strong Coupling with Protein Vibrational Modes". Journal of Physical Chemistry Letters 7, n. 20 (7 ottobre 2016): 4159–64. http://dx.doi.org/10.1021/acs.jpclett.6b01869.

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del Pino, Javier, Johannes Feist e F. J. Garcia-Vidal. "Signatures of Vibrational Strong Coupling in Raman Scattering". Journal of Physical Chemistry C 119, n. 52 (18 dicembre 2015): 29132–37. http://dx.doi.org/10.1021/acs.jpcc.5b11654.

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Più fonti

Tesi sul tema "Vibrational strong coupling"

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CEREA, ANDREA. "Vibrational Strong Coupling in THz Plasmonic Nanocavities". Doctoral thesis, Università degli studi di Genova, 2018. http://hdl.handle.net/11567/929183.

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Muller, Cyprien. "Supramolecular catalysis and vibrational strong coupling : how to influence chemical reactivity ?" Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAF014.

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Comment peut-on influencer la réactivité chimique ? Dans ce travail de thèse, j’ai tâché de répondre à cette question en explorant la frontière entre la chimie et la physique. Dans un premier temps, en tirant avantage du solvant 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) qui permet souvent une réactivité exotique, qui peut être attribuée à ses exceptionnelles propriétés physiques. Ces dernières font de HFIP une véritable matrice supramoléculaire, qui nous a permis le développement d’une nouvelle méthode pour la synthèse d’isochromanes fonctionnalisés. Ce faisant, une généralité et une simplicité opératoire inédites pour la synthèse de ce motif important furent atteintes. Dans un second temps, j’ai exploré la capacité de l’hybridation lumière-matière, accessible grâce au couplage fort vibrationnel (CFV) de modifier la cinétique de certaines réactions chimiques. Ainsi, en plaçant entre deux miroirs différents réactifs, j’ai étudié l’impact du CFV sur la nucléophilicité ainsi que sur la réactivité Diels-Alder
How can we influence chemical reactivity? Throughout this thesis, I attempted to answer this question by exploring the frontier between chemistry and physics.First, I took advantage of solvent 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) which often unlocks exotic reactivity that can be explained by its extraordinary physical properties. These properties make of HFIP a veritable supramolecular matrix, which allowed the development of a new method for the synthesis of densely functionalized isochromans. This method displayed unprecedented generality, simplicity, and practicality on the way to this pharmacologically important motif.Second, I investigated how light-matter hybridization, accessed through Vibrational Strong Coupling (VSC) could alter the kinetics of some chemical reactions. In practice, by placing different reactants between two mirrors, I studied the impact of VSC on nucleophilicity, as well as on Diels-Alder reactivity
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Hill, Tayler DeLanie. "ENZYME ACTIVE SITE DYNAMICS AND SUBSTRATE ORIENTATION PROBED VIA STRONG ANHARMONIC COUPLING IN AN ARYL-AZIDE VIBRATIONAL LABEL USING 2D IR SPECTROSCOPY". OpenSIUC, 2020. https://opensiuc.lib.siu.edu/dissertations/1842.

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Successful enzyme catalysis depends on many noncovalent interactions between the enzyme, cofactors, and substrate that poise the system to access a productive transition state. Motions on a variety of timescales contribute to this, but some controversy exists surrounding the role of ultrafast dynamics on catalysis. Site-specific 2D IR spectroscopy using probes of vibrational dynamics provides the opportunity to explore ultrafast motions in an enzyme active site owing to the technique’s spatial and temporal resolution. In this work, a series of aryl-azide vibrational labels were assessed using a variety of 2D IR techniques for their sensitivity to solvent and energy transfer processes, and their ability to be adapted to experiments in biomacromolecules. One of these labels, 4-azido-N-phenylmaleimide, is a substrate analog for the promiscuous ene-reductase from Pyrococcus horikoshii (PhENR). The label was covalently attached in two orientations in the enzyme active site, occupying the same position as native substrates based on X-ray crystallography and molecular dynamics simulations. FTIR and 2D IR spectroscopy were used to identify close-lying conformational states based on the strong anharmonic coupling of the label, revealing that the active site itself modulates the probe’s internal vibrational coupling. More commonly used analogous aryl-nitrile labels, however, were not sensitive to such small structural and lineshape changes. This demonstrates the importance of thoughtful label design to maximize the amount of information that can be gleaned from 2D IR studies. Using the methods herein—both spectroscopic and biochemical—provides a strategy for probing ultrafast motions that could possibly be catalytically relevant.
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Kara, Mustafa Can. "Fluid-structure interaction (FSI) of flow past elastically supported rigid structures". Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/51931.

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Fluid-structure interaction (FSI) is an important physical phenomenon in many applications and across various disciplines including aerospace, civil and bio-engineering. In civil engineering, applications include the design of wind turbines, pipelines, suspension bridges and offshore platforms. Ocean structures such as drilling risers, mooring lines, cables, undersea piping and tension-leg platforms can be subject to strong ocean currents, and such structures may suffer from Vortex-Induced Vibrations (VIV's), where vortex shedding of the flow interacts with the structural properties, leading to large amplitude vibrations in both in-line and cross-flow directions. Over the past years, many experimental and numerical studies have been conducted to comprehend the underlying physical mechanisms. However, to date there is still limited understanding of the effect of oscillatory interactions between fluid flow and structural behavior though such interactions can cause large deformations. This research proposes a mathematical framework to accurately predict FSI for elastically supported rigid structures. The numerical method developed solves the Navier-Stokes (NS) equations for the fluid and the Equation of Motion (EOM) for the structure. The proposed method employs Finite Differences (FD) on Cartesian grids together with an improved, efficient and oscillation-free Immersed Boundary Method (IBM), the accuracy of which is verified for several test cases of increasing complexity. A variety of two and three dimensional FSI simulations are performed to demonstrate the accuracy and applicability of the method. In particular, forced and a free vibration of a rigid cylinder including Vortex-Induced Vibration (VIV) of an elastically supported cylinder are presented and compared with reference simulations and experiments. Then, the interference between two cylinders in tandem arrangement at two different spacing is investigated. In terms of VIV, three different scenarios were studied for each cylinder arrangement to compare resonance regime to a single cylinder. Finally, the IBM is implemented into a three-dimensional Large-Eddy Simulation (LES) method and two high Reynolds number (Re) flows are studied for a stationary and transversely oscillating cylinder. The robustness, accuracy and applicability of the method for high Re number flow is demonstrated by comparing the turbulence statistics of the two cases and discussing differences in the mean and instantaneous flows.
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Capitoli di libri sul tema "Vibrational strong coupling"

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Schmidtke, H. H. "Vibrational progressions in electronic spectra of complex compounds indicating strong vibronic coupling". In Topics in Current Chemistry, 69–111. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/3-540-58155-3_3.

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Miller, R. E. "Weakly Bound Molecular Complexes as Model Systems for Understanding Chemical Reactions". In Chemical Reactions in Clusters. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195090048.003.0005.

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An issue of central importance in chemical reaction dynamics is the nature of the energy transfer processes within and between reactants and products. At a fundamental level, bond rupture and formation can be understood in terms of the transfer of energy into the reaction coordinate, causing a bond to break, and then relaxation of the energy away from the newly formed bonds in the product molecules to the other degrees of freedom of the system. By their very nature, these processes are highly anharmonic, making their detailed characterization a formidable challenge. In recent years, spectroscopists have taken on the challenge of trying to characterize the quantum states of a molecule at the high vibrational energies corresponding to the chemically interesting regime. At these energies, the density of states becomes extremely high and the coupling between the states very strong, the result being that the vibrations can no longer be characterized in terms of simple isolated local or normal modes. In the extreme limit, where RRKM theory (Wardlaw and Marcus 1987) applies, there is rapid energy redistribution that, at least approximately, samples the available states statistically, allowing us to overlook many of the fine details. Although we are still far from having a complete understanding of the quantum state dynamics of systems in this regime, the recent progress that has been made in both experiment (Felker and Zewail, 1985; Go et al., 1990; Parameter 1982, 1983; Smalley 1982) and theory (Stuchebrukhov and Marcus 1993; Uzer 1991) is helping to better define the important processes. Ultimately, the detailed characterization of all the intramolecular couplings in a molecule would provide us with a basis for understanding the chemistry at a fundamental level, in both the statistical and nonstatistical regimes. After all, energy transfer from one vibrational mode of a molecule to another is determined by the intermode couplings, which, in the ground electronic states of molecules, are predominantly due to anharmonic and/or coriolis effects. Of course, the problem becomes even more challenging when one moves from the realm of isolated molecules to solvated systems.
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Atti di convegni sul tema "Vibrational strong coupling"

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Dong, Bing, G. H. Ding e X. L. Lei. "Thermoelectric properties of a molecular junction with strong vibrational coupling". In 2015 IEEE 15th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2015. http://dx.doi.org/10.1109/nano.2015.7388941.

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Dayal, Govind, Ikki Morichika e Satoshi Ashihara. "Vibrational strong coupling between molecular vibration and subwavelength plasmonic cavity supporting gap plasmon mode". In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2019. http://dx.doi.org/10.1364/jsap.2019.18a_e208_2.

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We report on strong coupling between molecular vibrational resonances of polymethyl methacrylate (PMMA) molecules and gap plasmon resonance of an ultrathin plasmonic cavity in the midinfrared range. The strong coupling is achieved when the molecular vibrational mode and plasmonic cavity exchange energy faster than their relaxation rates and it is maximum when two relaxation rates are equal [1]. In this work, we designed, fabricated and characterized a composite medium consisting of a thin PMMA layer sandwiched between the nanoantenna array and a continuous metallic thin film to achieve vibration strong coupling. The spectral position and the relaxation rate of gap plasmonic resonance are tuned through the molecular resonance of the PMMA molecules (at 1730 cm−1) to go from weak to strong coupling regime. Strong coupling between vibrational modes and gap plasmon mode leads to the formation of new hybrid light-matter states called polaritonic states (@ 1690 cm−1 & 1810 cm−1), separated by the vacuum Rabi splitting (120 cm−1). Thin film coupled nanoantennas with sub-wavelength gaps have shown great potential in nanophotonic applications because they offer the ultimate electric field confinement in the gap. Our work is complementary to earlier work using microcavities and provides a new approach to achieve strong coupling with a nanoscale plasmonic cavity (λ/25) and the possibility to modulate the strong coupling regime by changing the gap thickness of the cavity and the lattice period of the nanoantenna array.
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Menghrajani, Kishan, Geoffrey R. Nash e William L. Barnes. "Strong Coupling of molecular vibrational resonances in a metal-clad microcavity". In Novel Optical Materials and Applications. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/noma.2018.now3d.7.

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Nishijima, Yoshiaki. "Metasurfaces for molecular emitter". In Conference on Lasers and Electro-Optics/Pacific Rim. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleopr.2022.cwp16g_02.

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We demonstrate extraordinarily spectrally selective narrowband mid-infrared radiation absorbance and thermal emittance with the strong surface enhancement of molecular infrared absorption (SEIRA) using mid-midinfrared metasurfaces. This was achieved by harnessing mode coupling between a plasmonic metal-insulator-metal (MIM) metasurface and molecular vibrational mode resonances. We found that the weak/strong coupling has a high potential for the future application of thermal emitters for mid-infrared light sources. We will present recent advances in the coupling of molecular vibration and metasurfaces.
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Gibson, G., T. S. Luk, A. McPherson, K. Boyer e C. K. Rhodes. "New Domain of Strong-Field Coupling: Production of Super-Excited States*". In High-Energy Density Physics with Subpicosecond Laser Pulses. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/hpslp.1989.m8.

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A new transition at 55.8 nm (22.2 eV) has been observed in N 2 2 + arising from multiphoton excitation of N2 with intense subpicosecond 248-nm radiation. The band has an observed width of ~ 0.3 nm FWHM, exhibits vibrational splittings, has an estimated radiative lifetime of ~ 100 ps, and is attributed to a 3Πu→ 3Πg excimer-like transition arising from the direct multiphoton production of molecular levels having a 2σg vacancy. The upper level has a ( 2 σ g − 1 , 1 π u − 1 ) configuration, an equilibrium internuclear separation of ~ 1.2 Å, and results from an entirely new strong-field mode of electronic excitation.
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Philips, Laura A., Christopher L. Brummel e Steven W. Mork. "High resolution infrared spectroscopy as a tool to measure chemical reaction dynamics". In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.thq4.

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Both intra- and intermolecular interactions play an important role in determining the potential surface for a chemical reaction. Such interactions determine both physical structure and chemical reactivity. High resolution infrared spectroscopy has been used to probe both molecular structure and vibrationally induced chemistry. 2-fluorethanol is an example of a molecule in which the strong attractive interactions between F and the OH moity not only determine the lowest energy conformation of the molecule, but also the most efficient vibrational excitation for inducing conformational isomerization. An analogue of 2-fluoroethanol, 1,2-difluoroethane, although similar in structure, has quite different intramolecular interactions. These differences are apparent in both the isomerization dynamics and the spectroscopy. Spectra were measured using a color center laser with optothermal detection (resolution = 10-4 cm-1). The spectra of these molecules allow us to link vibrational mode-coupling to chemical reactivity.
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Walkout, P. K., e P. F. Barbara. "Ultrafast Study of the Photodissociation and Recombination of Aqueous O3-". In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.tue.27.

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The photodissociation of the strongly solvated radical O3- (generating O2 and O-) has been studied in aqueous solution by femtosecond pump-probe spectroscopy for the first time. This study of O3- represents the first femtosecond pump-probe study of the photodissociation and geminate recombination of a triatomic radical anion in solution. I3-, a non-radical, is the only other charged triatomic in solution whose photodissociation has been studied with comparable time- resolution.1 From a solution dynamics standpoint there are many features of O3- which make it an interesting radical to examine. O3- has highly concentrated charges (small atomic radii) leading to extraordinarily large electrostatic solute/solvent interactions. O3- has two high-frequency vibrational fundamentals (1058 cm-1, 880 cm-1), thus requiring a quantum mechanical description of the relaxation process. Finally, O3- has a much lower dissociation energy in water (De = 0.34 eV) than the gas phase (De =1.7 eV), further emphasizing the especially strong solute/solvent coupling in this system.
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Menghrajani, Kishan, Geoffrey R. Nash e William L. Barnes. "Strong Coupling of Vibrational Modes: an Investigation using Infrared and Raman Spectroscopy Kishan. S. Menghrajani, GeofF.R. Nash, William. L. Barnes School of Physics and Astronomy, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK km508@exeter.ac.uk". In International Conference on Fibre Optics and Photonics. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/photonics.2016.w3a.27.

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Rothberg, Lewis. "Picosecond infrared measurements in condensed matter". In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.fm2.

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Difference frequency mixing of amplified femtosecond visible pulses with white light continuum radiation produces relatively broadband infrared pulses (~10 meV), whose bandwidth is determined by the phase matching bandwidth of the difference frequency crystal. This radiation is easily tuned over a broad range (hundreds of meV) by angle tuning of the crystal. One application is the study of photogenerated charge carriers in the quasi-one-dimensional organic semiconductor trans-polyacetylene. Beause of the strong electron-phonon coupling, electrons and holes are dressed by the lattice leading subgap levels (0.45eV). Using transient mid-infra-red spectroscopy, we can observe the subpicosecond lattice deformation as well as measure gemmate recombination dynamics and interchain excitation probabilities. These data have been used to understand the photoconductivity and nonlinear optical properties of polyacetylene. Up-conversion gating of long tunable narrowband infrared pulses by an amplified subpicosecond laser is particularly valuable for subpicosecond vibrational spectroscopy. For example, the behavior of the CO ligands can be tracked during organometallic photochemistry to provide information about their cooling, rebinding, and reorientation. Issues such as the solvation of catalytically active metal carbonyls in solution and the pathway by which CO enters and exits hemoglobin are addressed.
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Memmi, Hala, Oliver Benson, Sergey Sadofev e Sascha Kalusniak. "Strong coupling between surface plasmon polaritons and molecular vibrations". In 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2017. http://dx.doi.org/10.1109/cleoe-eqec.2017.8087689.

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