Дисертації з теми "Plasmonic lattice"
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Saad-Bin-Alam, Md. "Analysis of Plasmonic Metastructures for Engineered Nonlinear Nanophotonics." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39120.
Повний текст джерелаHumphrey, Alastair Dalziell. "Exploration of how light interacts with arrays of plasmonic, metallic nanoparticles." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/19365.
Повний текст джерелаDanilov, Artem. "Design, characterisation and biosensing applications of nanoperiodic plasmonic metamaterials." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0110/document.
Повний текст джерелаThis thesis consideres novel promissing architechtures of plasmonic metamaterial for biosensing, including: (I) 2D periodic arrays of Au nanoparticles, which can support diffractively coupled surface lattice resonances; (II) 3D periodic arrays based on woodpile-assembly plasmonic crystals, which can support novel delocalized plasmonic modes over 3D structure. A systematic study of conditions of plasmon excitation, properties and sensitivity to local environment is presented. It is shown that such arrays can combine very high spectral sensitivity (400nm/RIU and 2600 nm/RIU, respectively) and exceptionally high phase sensitivity (> 105 deg./RIU) and can be used for the improvement of current state-of-the-art biosensing technology. Finally, a method for probing electric field excited by plasmonic nanostructures (single nanoparticles, dimers) is proposed. It is implied that this method will help to design structures for SERS, which will later be used as an additional informational channel for biosensing
Huang, Wenyu. "Fundamental studies of the interaction between femtosecond laser and patterned monolayer plasmonic nanostructures." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/24786.
Повний текст джерелаCommittee Chair: El-Sayed, Mostafa A.; Committee Member: Perry, Joseph W.; Committee Member: Srinivasarao, Mohan; Committee Member: Whetten, Robert L.; Committee Member: Zhang, Z. John.
Carrega, Matteo. "Coulomb drag and Dirac plasmons in novel 2D electron systems." Doctoral thesis, Scuola Normale Superiore, 2014. http://hdl.handle.net/11384/85870.
Повний текст джерелаBuller, Jakov. "Structure and Dynamics of Microcavity Exciton-Polaritons in Acoustic Square Lattices." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19328.
Повний текст джерелаMicrocavity (MC) exciton-polaritons can form condensates, i.e. macroscopic quantum states (MQSs), as well under a periodic potential modulation. The modulation by a surface acoustic wave (SAW) provides a powerful tool for the formation of tunable lattices of MQSs in semiconductor MC. In this work, fundamental aspects of the structure and dynamics of exciton-polariton condensate in acoustic square lattices were investigated by probing its wavefunction in real- and momentum space using spectral- and time-resolved studies. The MQSs were resonantly excited in an optical parametric oscillator configuration. The tomographic study revealed that the exciton-polariton condensate structure self-organises in a concentric structure, which consists of a single, two-dimensional gap soliton (2D GS) surrounded by one-dimensional MQSs and an incoherent background. 2D GS size tends to saturate with increasing particle density. The experimental results are supported by a theoretical model based on the variational solution of the Gross-Pitaevskii equation. Time-resolved studies showed the evolution of the 2D GS wavefunction at the acoustic velocity. Interestingly, the photoluminescence (PL) intensity emitted by the 2D GS as well as its coherence length oscillate with time. The PL oscillation amplitude depends on the intensity and the size of the exciting laser spot, and increases considerably for excitation intensities close to the optical threshold power for the formation of the MQS. In the outlook, the formation of Tamm-Plasmon/Exciton-Polariton (TPEP) hybrid states and their modulation by SAWs was theoretically discussed. Here, the upper DBR is partly replaced by a thin metal layer placed on top of the MC. In this case, TPEP form by the superposition of Tamm plasmons at the metal-semiconductor interface and the exciton-polaritons in the MC.
Hamdad, Sarah. "Synthèse et étude de réseaux de nanoparticules métalliques pour l'exaltation de l'électroluminescence des OLEDs via l'effet plasmonique." Thesis, Paris 13, 2021. http://www.theses.fr/2021PA131056.
Повний текст джерелаIn this thesis work, we were interested in studying the improvement of the optical and electrical properties of OLEDs using square arrays of Ag nanoparticles. In particular, we focused on the study of surface lattice resonance (SLR) modes in order to understand the interaction mechanisms between the NPs in a grating. We have also studied the influence of these modes on the emission characteristics of an organic layer first under optical pumping and then under electrical pumping. For this, we have set up within the LPL laboratory several optical experiments and developed several numerical calculations in order to interpret the obtained results. These latter confirm the crucial role of Rayleigh anomalies in the appearance of directional emission. In the case of OLEDs, the studies carried out show that the presence of short period metallic structures can help to improve the electrical injection process of holes into the organic device. Besides, we show that the insertion of a longue period grating can improve the efficiency of the OLED. However, the existence of collective SLR modes is not guaranteed in this type of configuration and the emission directivity effects require further studies. The results obtained within the framework of this thesis work constitute an important step towards a deep understanding of the interactions between the grating of metallic NPs and the organic emitters and could open the way towards the study and the realization of superriadiant OLEDs, which would constitute an intermediate step to go to the organic laser diode
Mischok, Andreas, Robert Brückner, Hartmut Fröb, Vadim G. Lyssenko, and Karl Leo. "Photonic lattices in organic microcavities: Bloch states and control of lasing." SPIE, 2015. https://tud.qucosa.de/id/qucosa%3A35053.
Повний текст джерелаWatt, Morag. "Inelastic light scattering in low dimensional semiconductors." Thesis, University of Glasgow, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364643.
Повний текст джерелаBellouvet, Maxime. "Condensation de Bose-Einstein et simulation d’une méthode de piégeage d’atomes froids dans des potentiels sublongueur d’onde en champ proche d’une surface nanostructurée." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0265/document.
Повний текст джерелаAn interest for hybrid quantum systems (HSQs) has been growing up for the last decades. This object combines two quantum systems in order to take advantage of both systems’ qualities, not available withonly one. Among these quantum systems, ultracold atoms distinguish themselves by their strong decoupling from environment which enables an excellent control of their intrinsic properties. Optical lattice quantum simulators with tunable properties (energy scale, geometry,...) allows one to investigate new regimes incondensed matter physics. In this quest for exotic quantum phases (e.g., antiferromagnetism), the reduction of thermal entropy is a crucial challenge. The price to pay for such low temperature and entropy is a longthermalization time that will ultimately limit the experimental realization. Miniaturization of lattice spacingis a promising solution to speed up the dynamics. Engineering cold atom hybrids offers promising perspectives but requires us to interface quantum systems in different states of matter at very short distances, which still remains an experimental challenge.This thesis is part of the AUFRONS project, which aims at cooling down an atomic gas until the quantum degeneracy regime then transport and trap this cloud in the near field of a nanostructure. The idea is to trapcold atoms in a two-dimensional subwavelength lattice, at a few tenth of nm away from the surface. One goal is to study atom-atom interactions within the lattice but also atom-surface modes coupling.The work realized during this thesis splits into an experimental part and a theoretical part. In the firstone, we present the cooling of 87Rb atoms until the quantum degeneracy regime. The second part is dedicated to theoretical simulations of a new trapping method we have implemented to trap and manipulate cold atoms below 100 nm from structures. This method takes advantage of plasmonic resonance and vacuum forces (Casimir-Polder effect). It allows one to create subwavelength potentials with controllable parameters.We detail the calculations of optical and vacuum forces to apply them to an atom of 87Rb in the vicinity of a 1D nanostructure
Benia, Hadj Mohamed. "Spatially resolved optical measurements on supported metal particles and oxide surfaces with the STM." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2008. http://dx.doi.org/10.18452/15862.
Повний текст джерелаIn this thesis, the correlation between the optical properties and the local morphology of supported silver nanoparticle ensembles and MgO thin films deposited on Mo(001) systems is explored by means of Photon-STM. In the first section, dome and disk shaped Ag nanoparticle ensembles with increasing density on an alumina film on NiAl(110) were analyzed as well as ordered and disordered ensembles of Ag nanocolloids on HOPG. The aspect ratio of the Ag nanoparticles was found to have a significant influence not only on the Mie plasmon resonance of a single particle, but also on the electromagnetic coupling within the nanoparticle ensembles. The Mie resonance in the ensemble of dome shaped Ag nanoparticles shows a strong dependence on the interparticle distance, where it shifts to higher energies with increasing particle density, due to destructive interference effects. In the disk-like Ag ensembles, however, the plasmon energy is independent of particle-particle separation. The long-range lateral ordering of size-selected Ag nanocolloids is found to induce a high dipole-dipole coupling within the ensemble. This is mainly reflected by the enhancement of the spectral intensity of the in-plane Mie mode, due to constructive coupling. However, ensembles with either well-ordered or disordered arrangements reveal no important difference in their optical properties, reflecting the weak influence of the long-range order in the particle ensemble. Thin MgO films with different thicknesses were grown on a Mo(001) surface. The stress resulting from the 5.3% lattice mismatch between the MgO(001) and the Mo(001) lattice parameters is found to control the surface morphology of the MgO film until thicknesses of around 25ML at which flat and defect-poor films are obtained. The relaxation of the stress induces a periodic network in the first 7ML of the MgO film, consisting of alternated flat and tilted mosaics. The presence of screw dislocations, steps oriented along the MgO directions, and tilted planes is observed when the MgO films are approximately 12ML thick. In addition, an increase of the MgO work function around these new surface features is revealed from STM spectroscopy. The photon emission induced by field-emitted electron injection from the STM tip into the MgO films is dominated by two emission bands located at 3.1eV and 4.4eV. To check the origin of these bands, further experiments, namely, nucleation of Au particles and creation of F-centers on the MgO surface, have been performed. The nucleation of Au particles at the low coordinated sites is found to quench the MgO optical signal, while the creation or annihilation of F-centers does not alter the MgO emission bands. The 3.1eV and the 4.4eV bands are therefore assigned to the radiative decay of MgO excitons at corner and kink sites, and step sites, respectively. Besides, spatially resolved optical measurements in the tunneling mode of the STM revealed different light emission mechanisms. These radiative processes are mainly related to tip-induced plasmons that form between the tip and the Mo support and to electron transitions between field-emission-resonance states in the STM tip-MgO film junction. The signal from exciton decays at corners and kinks of the MgO surface is however only observed at excitation conditions where the spatial resolution is already strongly reduced.
Chen, Kuan-Yu, and 陳冠宇. "Transport and trapping in two-dimensional nanoscale plasmonic optical lattice." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/35809634060977170738.
Повний текст джерела國立清華大學
電子工程研究所
101
Recently, optical tweezers has been created various dimensions of periodic potential lattice for affecting the behavior of particles. According to the limitation of diffraction limit, it is difficult to shrink the experiment into nanoscale. In recent, plasmanic enhanced optical trapping can overcome the limitation of traditional optical tweezers because the surface plasmon concentrate light far below the diffraction limits and enhance optical intensity by resonance. In this thesis, we research the transport and trapping behavior of nanospheres of diameter 500 nm and 100 nm in two-dimensional nanoscale plasmanic optical lattice. Optical potential of the lattice is created by a two-dimensional of gold nanostructure array, and the plasmon resonance is illuminated by Gaussian beam. We observe the transport and trapping behavior of nanospheres in this optical potential. The stacking of diameter 500 nm spheres into hexagonal closed pack crystalline in this potential is also observed clearly. In this thesis, we introduce the setup of optical system clearly and make an explanation about the calculation and fabrication process of plasmonic structures.
"Tailoring the plasmonic modes of metal nanoparticle arrays with lattice anisotropy." 2014. http://repository.lib.cuhk.edu.hk/en/item/cuhk-1291418.
Повний текст джерелаThesis M.Phil. Chinese University of Hong Kong 2014.
Includes bibliographical references (leaves 114-118).
Abstracts also in Chinese.
Title from PDF title page (viewed on 30, September, 2016).
Lai, King Chun = Ge xiang yi xing na mi ke li jing ge de deng li zi ti mo shi de cao zuo / Li Jingjun.
"Study of gradon confinements in graded elastic and plasmonic lattices." Thesis, 2009. http://library.cuhk.edu.hk/record=b6074954.
Повний текст джерелаGradon confinements in graded materials and/or systems open a door for tunable fields-controlling, which have potential applications in a variety of fields. Our research methods and results provide an effective way to understand field localization in a variety of systems, and they can be applied to design and manufacture thermal devices and even on-chip plasmonic-optical devices.
Gradon confinements, or referred as frequency-controlled localization of fields are investigated in various graded plasmonic lattices. The correspondences between gradon confinements and Bloch oscillations as well as nonBloch oscillations are explored. By taking into account retardation and loss effects, the asymmetric localization behavior and broadband localizat ion due to graded host permittivity are studied.
This thesis will concentrate on gradon confinements, which make controlling fields and properties tunable in graded materials and/or systems. We start with investigating gradon modes and their properties in graded elastic lattices. Using the quantum-classical analogue method, the analytic envelope function is obtained and can be used to analyze the system-size dependence of inverse participation ratio of gradon modes. In damping graded elastic lattices , the frequency-dependent behavior of relaxation rate are studied analytically and numerically.
We continue to study the three-dimensional graded plasmonic lattices with fully retarded electromagnetic interactions. A generalized Ewald-Kornfeld summation formula is developed to deal with the long-range interaction. In the quasistatic limit, various plasmonic gradon modes are investigated. Taking retardation and loss into account, field localization and enhancement are calculated in three-dimensional graded plasmonic lattices with graded size, spacing, and/or host permittivity in one direction.
Zheng, Mingjie = 弹性和等离子体梯度子禁闭研究 / 郑明杰.
Adviser: Kin Wah Yu.
Source: Dissertation Abstracts International, Volume: 72-11, Section: B, page: .
Thesis (Ph.D.)--Chinese University of Hong Kong, 2009.
Includes bibliographical references (leaves 117-124) and index.
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [201-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstract also in Chinese.
Zheng, Mingjie = Tan xing he deng li zi ti ti du zi jin bi yan jiu / Zheng Mingjie.
Hung, Chia-Chun, and 洪嘉駿. "Characterization of transport behavior of nano particle in a simple nanoscale plasmonic optical lattice." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/27118168958913680916.
Повний текст джерела國立清華大學
電子工程研究所
103
In solid state physics, a periodic crystal consists of a Bravais lattice and a unit cell. We can assign a Bravais lattice and a unit cell for a given metallic periodic nanostructures.We report the characterization of transport of 500 nm nanospheres in a plasmon-enhanced, polarization controlled two-dimensional square lattice. The optical potential is created by illuminating an array of gold nanodisks with a Gaussian beam to excite plasmon resonance. To characterize the particle trajectory in a quantitative way, we have collected more than ~180 trajectories at different incident light intensity. Fluorescently labeled nanospheres of 500 nm is dispensed on the sample and the motion is recorded by fluorescent imaging with the CCD camera. A custom Matlab program is then used to adjust the threshold of the image and extract the particle trajectory data. We observe weak kinetic locked in with most prominent "channeling" direction along directions of [01],[11],and [10].
Yadav, Ravindra Kumar. "Study of room temperature coupling of colloidal quantum dots to plasmonic arrays and metamaterials: from single quantum dot to quantum dot assemblies." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/5086.
Повний текст джерелаChen, Kuang-Cheng, and 陳廣正. "Plasmonic Luneburg Lens Antenna Synthesized by Metasurfaces with Hexagonal Lattices." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/jmg79a.
Повний текст джерела國立交通大學
電信工程研究所
105
Nowadays, research on metasurfaces has been widespread since the potential in several areas such as optics, photonics, antennas, sensing, imaging, and spectroscopy. The metasurface lens composes of 2D periodic metallic patch possesses several advantages such as light, low-profile, compact and also cheaper than the traditional lens array which practical implementation has been proposed. However, most of them didn’t mention the flaw of the wave propagating direction of dispersion characteristic when applying on metasurface lens’ synthesis. In this thesis, a Luneburg lens applies on surface wave antenna is proposed, further, two different types of unit cell will be compared, one varies significantly with the wave propagating direction, another does not, and analyze based on the dispersion characteristic. It will be verified by the performance of surface wave antenna composed of both unit cells. Several sub efficiencies of an aperture antenna used for characterization. Also, a novel synthesis will be presented to improve the performance of the lens’ surface wave antenna application.
König, Tobias A. F. "Functional optical surfaces by colloidal self-assembly: Colloid-to-film coupled cavities and colloidal lattices." 2020. https://tud.qucosa.de/id/qucosa%3A73726.
Повний текст джерелаZukünftige Entwicklungen in der Nanophotonik erfordern einfache, kostengünstige und parallelisierbare Herstellungsmethoden und benötigen ein grundlegendes Verständnis der spektroskopischen Eigenschaften solcher Nanostrukturen. Diese Herausforderungen können durch kolloidale Selbstorganisation erfüllt werden, bei der kostengünstige und zuvor synthetisierte Kolloide großflächig angeordnet werden. Als sogenannte kolloide Bausteine werden wegen ihrer lokalisierten Lichtfokussierung unterhalb der Beugungsbegrenzung plasmonische Nanopartikel sowie wegen ihrer lokalisierten Lichtemission Quantenpunkte verwendet. Diese nanoskopischen Kolloide werden in dieser Habilitationsschrift verwendet und durch Selbstanordnung in ihre gewünschte Nanostruktur gebracht, die neue hybride Eigenschaften aufweist. Um den Energietransfer zwischen diesen nanoskopischen Bausteinen zu untersuchen, werden Konzepte aus der physikalischen Optik verwendet und mit dem kolloidalen Selbstorganisationskonzept aus der physikalischen Chemie großflächig umgesetzt. Durch eine etablierte Synthese sind die Nanokristalle nun in großen Mengen verfügbar, wobei sie durch gerichtete Selbstorganisation die gewünschten spektroskopischen Eigenschaften erhalten. Darüber hinaus ermöglicht die Verwendung von stimulierbaren Polymeren eine Funktionalität, die über die bisherigen Entwicklungen hinausgeht. Die in dieser Habilitationsschrift entwickelten Grundlagen können bei der Entwicklung neuartiger Funktionsgeräte im Bereich für intelligente Sensorik, dynamischer Lichtmodulatoren und großflächiger Quantengeräte genutzt werden.:1 Abstract 2 2 State of the art 4 2.1 Metallic and semiconductive nanocrystals as colloidal building blocks 4 2.2 Concept of large-scale colloidal self-assembly 7 2.3 Functional optical nanomaterials by colloidal self-assembly 9 2.4 Scope 13 2.5 References 14 3 Single colloidal cavities 20 3.1 Nanorattles with tailored electric field enhancement 20 4 Colloidal -to-film coupled cavities 31 4.1 Template-assisted colloidal self-assembly of macroscopic magnetic metasurfaces 31 4.2 Single particle spectroscopy of radiative processes in colloid-to-film-coupled nanoantennas 50 4.3 Active plasmonic colloid-to-film coupled cavities for tailored light-matter interactions 65 5 Colloidal polymers 74 5.1 Direct observation of plasmon band formation and delocalization in quasi-infinite nanoparticle chains 74 6 Colloidal lattice 84 6.1 Hybridized guided-node resonances via colloidal plasmonic self-assembled grating 84 6.2 Mechanotunable surface lattice resonances in the visible optical range by soft lithography templates and directed self-assembly 94 6.3 Tunable Circular Dichroism by Photoluminescent Moiré Gratings 103 7 Conclusion and perspective 112 8 Appendix 113 8.1 Further publications during the habilitation period 113 8.2 Curriculum vitae of the author 116 9 Acknowledgments 117 10 Declaration 118
Yang, Tsang Po, and 楊倉博. "Characterization of the near-field and convectional transport behavior of nanoparticles in nanoscale plasmonic opticla lattices." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/71501899481358283282.
Повний текст джерела國立清華大學
電子工程研究所
104
Abstract We report the characterization of transport of nanosphere in two-dimensional simple square nanoscale plasmonic optical lattice.The optical potential is created by illumination an array of gold nanodisks with a loosely focused Gaussian beam to excite plasmonic resonance. Such optical potential confers both in lattice particle transport due to near field optical gradient force and photothermallly induced convection transport behavior.The convection transport results from a delocalized temperatue profile from photothermally heating of the nanoplasmonic array.Simulation of the convection is also given. In order to know the transport behavior ,we observe 500nm sepheres in the lattice and using micron size of sepheres which are out of lattice.Then,we analyze the trajectory and calculate the velocity to compare the sepheres which are in lattice and the sepheres which are out of the lattice.This work opens up new avenues for combination both the thermally assisted long range transport and the short range near field trapping of plasmonic optical lattice.