Light Matter Interactions Of Two Dimensional Materials And The Coupled Nanostructures PDF Download
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| Author | : Shengxi Huang (Ph. D.) |
| Publisher | : |
| Total Pages | : 244 |
| Release | : 2017 |
| Genre | : |
| ISBN | : |
Download Light-matter Interactions of Two-dimensional Materials and the Coupled Nanostructures Book in PDF, ePub and Kindle
Two-dimensional (2D) materials have gained increasing attention due to their unique and extraordinary electrical and optoelectronic properties. These properties can be largely attributed to the fundamental light-matter interactions. This thesis project uses spectroscopy techniques and focuses on the study of the light-matter interaction in 2D materials, as well as their coupling with other nanostructures, which are essential in achieving useful optoeletronic applications with 2D materials. First, the fundamental properties of 2D materials were investigated using spectroscopy. Photoluminescence (PL) spectroscopies of MoS2 and its related structures were studied, showing that the interaction between MoS2 layers and other dielectrics can strongly affect their PL emissions, exciton and trion properties. Moreover, combining Raman spectroscopy and X-ray photoelectron spectroscopy, the effects of substrates and defects for MoS2 have been revealed. Next, interlayer vibrational properties of 2D materials are studied utilizing low-frequency Raman spectroscopy. Twisted bilayer MoS2 and few-layer black phosphorus were chosen to demonstrate the interlayer coupling from the perspective of interlayer breathing and shear Raman modes. These exemplary studies offer a great tool to investigate the interlayer coupling, thickness, and stacking configurations of 2D materials using low-frequency Raman spectroscopy. The anisotropic light-matter interactions of 2D materials were also examined. Using polarization dependent Raman and optical absorption spectroscopies, together with first-principles density functional theory analysis and group theory, the anisotropy of electron-photon and electron-phonon interactions can be revealed. This method can experimentally exhibit the anisotropy of electron-phonon interactions in 2D materials, and can be generalized to other layered materials with in-plane anisotropy. The interactions of 2D materials with other materials systems were also investigated using optical spectroscopies. The interactions of 2D materials and selected organic molecules were revealed using graphene-enhanced Raman spectroscopy. The interaction between 2D materials and plasmonic nanocavities were found to exhibit an interesting enhancement phenomenon for the optical response of 2D materials. Overall, the studies presented in this thesis work show broad opportunities for using spectroscopic tools to study light-matter interactions of 2D materials, as well as the combined system of 2D materials and other nanostructures. This work is significant fundamentally, and also offers useful guidelines for practical applications of 2D materials in electronics and optoelectronics.
| Author | : Paulo André Dias Gonçalves |
| Publisher | : Springer Nature |
| Total Pages | : 232 |
| Release | : 2020-03-19 |
| Genre | : Science |
| ISBN | : 3030382915 |
Download Plasmonics and Light–Matter Interactions in Two-Dimensional Materials and in Metal Nanostructures Book in PDF, ePub and Kindle
This thesis presents a comprehensive theoretical description of classical and quantum aspects of plasmonics in three and two dimensions, and also in transdimensional systems containing elements with different dimensionalities. It focuses on the theoretical understanding of the salient features of plasmons in nanosystems as well as on the multifaceted aspects of plasmon-enhanced light–matter interactions at the nanometer scale. Special emphasis is given to the modeling of nonclassical behavior across the transition regime bridging the classical and the quantum domains. The research presented in this dissertation provides useful tools for understanding surface plasmons in various two- and three-dimensional nanostructures, as well as quantum mechanical effects in their response and their joint impact on light–matter interactions at the extreme nanoscale. These contributions constitute novel and solid advancements in the research field of plasmonics and nanophotonics that will help guide future experimental investigations in the blossoming field of nanophotonics, and also facilitate the design of the next generation of truly nanoscale nanophotonic devices.
| Author | : Yuerui Lu |
| Publisher | : CRC Press |
| Total Pages | : 298 |
| Release | : 2019-10-31 |
| Genre | : Computers |
| ISBN | : 0429768001 |
Download Two-Dimensional Materials in Nanophotonics Book in PDF, ePub and Kindle
Two-dimensional (2D) materials have attracted tremendous interest since the study of graphene in the early 21st century. With their thickness in the angstrom-to-nanometer range, 2D materials, including graphene, transition metal dichalcogenides, phosphorene, silicene, and other inorganic and organic materials, can be an ideal platform to study fundamental many-body interactions because of reduced screening and can also be further engineered for nanophotonic applications. This book compiles research outcomes of leading groups in the field of 2D materials for nanophotonic physics and devices. It describes research advances of 2D materials for various nanophotonic applications, including ultrafast lasers, atomically thin optical lenses, and gratings to inelastically manipulate light propagation, their integrations with photonic nanostructures, and light–matter interactions. The book focuses on actual applications, while digging into the physics underneath. It targets advanced undergraduate- and graduate-level students of nanotechnology and researchers in nanotechnology, physics, and chemistry, especially those with an interest in 2D materials.
| Author | : Anshuman Kumar (Ph. D.) |
| Publisher | : |
| Total Pages | : 150 |
| Release | : 2016 |
| Genre | : |
| ISBN | : |
Download Engineering Light-matter Interaction Using Two Dimensional Materials Book in PDF, ePub and Kindle
The recent discovery of a new class of two dimensional(2D) atomic crystals allows the possibility of strong coupling of electromagnetic waves with various collective excitations such as plasmons and phonons, and carries great potential for nanophotonics across the long sought after terahertz to mid-infrared spectrum. In this thesis, I will show a few examples of how light-matter interaction can be engineered in 2D materials, through the modification of both microscopic as well as macroscopic properties of such materials. I describe how the plasmons in graphene are modified by coupling with the optical phonons of the naturally hyperbolic material, hexagonal boron nitride (hBN). I examine theoretically the mid-infrared emission properties of graphene-hBN heterostructures derived from their coupled plasmon-phonon modes, leading to the appearance of tunable dips in the spontaneous emission spectra. Going beyond graphene, I consider a generic gapped Dirac system. I show that the valley imbalance due to pumping with a specific circular polarization, leads to a net Berry curvature, giving rise to a finite transverse conductivity. Using this model, I predict the appearance of nonreciprocal chiral edge modes, their hybridization and waveguiding in a nanoribbon geometry, and giant polarization rotation in nanoribbon arrays. Among macroscopic structural effects, I consider localized plasmon resonances in nanostructures of 2D materials and the development of transformation optics methods. I formulate a general semi-analytical framework for a system of discs, whereby emission and absorption properties of dark and bright plasmonic modes are studied, as a function of graphene doping. Furthermore, I employ an open quantum systems formalism to show that under certain conditions, both the dark and bright dipolar modes in this system can support vacuum Rabi splittings for the plasmon-emitter coupling. Secondly, I expand the concept of transformation optics by formulating a novel scheme that can tackle arbitrary spatial variations of 2D materials, which are usually described by a surface conductivity. The novel phenomena enabled by photonic modes in two dimensional materials together with the ideas proposed in this thesis provide a basis for engineering light-matter interaction and controlling energy flow at the nanoscale.
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2019 |
| Genre | : |
| ISBN | : |
Download Light-matter Interactions in Plasmonic Arrays, Two Dimensional Materials and Their Hybrid Nanostructures Book in PDF, ePub and Kindle
Abstract : The complementary optical properties of metal and semiconductor materials make them attractive for many applications that require the electromagnetic fields down to the nanoscale. The electronic, optical and mechanical properties of metal and semiconductor nanostructures could be controlled by the size, shape and local dielectric environment. In this dissertation, I focus on the study of the light-matter interactions in plasmonic nanostructures, two-dimensional (2D) materials, as well as their hybrid nanostructures. In the plasmonic nanostructures, square and hexagonal Au hollow nanodome film arrays were fabricated by means of anodized alumina oxide (AAO) templates. Both the nanostructures can support surface plasmon polaritons (SPPs) of strong air-Au and weak Au-glass modes in the light dispersions. The periodic geometries of the nanostructures could control the mode crossings of distinct SPPs. Decreasing the cross-sectional heights of the continuous and hierarchical hexagonal hollow nanodome arrays leads to significant linewidth narrowing of SPPs by reducing scattering loss. To achieve a longer propagation length of SPPs in the plasmonic nanostructures, plus taking the variation in intensity of SPPs into account, the optimized surface modulation depth can be found. The light-matter interactions of 2D materials were explored through the measurements of the nonlinear optical properties of the vertical and planar spiral MoS2 nanosheets. The vertical and planar spiral MoS2 were grown by chemical vapor deposition (CVD). The growth mechanism of these nanostructures was also investigated. Both the nanostructures have a polytype 3R stacking with broken inversion symmetry leading to strong second and third harmonic generations. Plasmon-exciton coupling and Fano resonances in hybrid nanostructures of plasmonic nanostructures with 2D materials were investigated. The spectral positions of surface plasmon resonances could be tuned by periodicity of Au nanorod arrays. Excitons with large binding energy are from the monolayer transition-metal dichalcogenides (TMDCs). From the hybrid nanostructures of Au nanorod array with monolayer WS2,the in-plain dipole moment of bright exciton in TMDCs allows only narrow spectral range of the plasmon-exciton coupling in the resonant scattering measurements. In hybrid nanostructures of Au nanorod arrays with hetero-bilayer WS2/WSe2, two Fano resonances in a reflection spectrum are observed due to the interference between the excitons of bilayer WS2-WSe2 and the plasmon continuum. Incident light polarization along the different axes of Au nanorod can tune the Fano resonance parameters.
| Author | : Alessandro Molle |
| Publisher | : Elsevier |
| Total Pages | : 474 |
| Release | : 2022-07-04 |
| Genre | : Science |
| ISBN | : 0128238240 |
Download Xenes Book in PDF, ePub and Kindle
Xenes: 2D Synthetic Materials Beyond Graphene includes all the relevant information about Xenes thus far reported, focusing on emerging materials and new trends. The book's primary goal is to include full descriptions of each Xene type by leading experts in the area. Each chapter will provide key principles, theories, methods, experiments and potential applications. The book also reviews the key challenges for synthetic 2D materials such as characterization, modeling, synthesis, and integration strategies. This comprehensive book is suitable for materials scientists and engineers, physicists and chemists working in academia and R&D in industry. The discovery of silicene dates back to 2012. Since then, other Xenes were subsequently created with synthetic methods. The portfolio of Xenes includes different chemical elements of the periodic table and hence the related honeycomb-like lattices show a wealth of electronic and optical properties that can be successfully exploited for applications. Introduces the most important Xenes, including silicene, germanene, borophene, gallenene, phosphorene, and more Provides the fundamental principles, theories, experiments and applications for the most relevant synthetic 2D materials Addresses techniques for the characterization, synthesis and integration of synthetic 2D materials
| Author | : Tongcheng Yu |
| Publisher | : |
| Total Pages | : |
| Release | : 2021 |
| Genre | : |
| ISBN | : |
Download Materials and Nanostructures for Light-matter Interactions in 2D. Book in PDF, ePub and Kindle
| Author | : Eui-Hyeok Yang |
| Publisher | : Elsevier |
| Total Pages | : 502 |
| Release | : 2020-06-19 |
| Genre | : Technology & Engineering |
| ISBN | : 0128184760 |
Download Synthesis, Modelling and Characterization of 2D Materials and their Heterostructures Book in PDF, ePub and Kindle
Synthesis, Modelling and Characterization of 2D Materials and Their Heterostructures provides a detailed discussion on the multiscale computational approach surrounding atomic, molecular and atomic-informed continuum models. In addition to a detailed theoretical description, this book provides example problems, sample code/script, and a discussion on how theoretical analysis provides insight into optimal experimental design. Furthermore, the book addresses the growth mechanism of these 2D materials, the formation of defects, and different lattice mismatch and interlayer interactions. Sections cover direct band gap, Raman scattering, extraordinary strong light matter interaction, layer dependent photoluminescence, and other physical properties. Explains multiscale computational techniques, from atomic to continuum scale, covering different time and length scales Provides fundamental theoretical insights, example problems, sample code and exercise problems Outlines major characterization and synthesis methods for different types of 2D materials
| Author | : Patrick Vogt |
| Publisher | : Springer |
| Total Pages | : 276 |
| Release | : 2018-11-02 |
| Genre | : Science |
| ISBN | : 3319999648 |
Download Silicene Book in PDF, ePub and Kindle
This book discusses the processing and properties of silicene, including the historical and theoretical background of silicene, theoretical predictions, the synthesis and experimental properties of silicene and the potential applications and further developments. It also presents other similar monolayer materials, like germanene and phosphorene. Silicene, a new silicon allotrope with a graphene-like, honeycomb structure, has recently attracted considerable interest, because its topology affords it the same remarkable electronic properties as those of graphene. Additionally, silicene may have the potential advantage of being easily integrated in current Si-based nano/micro-electronics, offering novel technological applications. Silicene was theoretically conjectured a few years ago as a stand-alone material. However, it does not exist in nature and had to be synthesized on a substrate. It has since been successfully synthesized and multi-layer silicene structures are already being discussed. Within just a few years, silicene is now on the brink of technological applications in electronic devices.
| Author | : Alexander V. Kolobov |
| Publisher | : Springer |
| Total Pages | : 545 |
| Release | : 2016-07-26 |
| Genre | : Technology & Engineering |
| ISBN | : 3319314505 |
Download Two-Dimensional Transition-Metal Dichalcogenides Book in PDF, ePub and Kindle
This book summarizes the current status of theoretical and experimental progress in 2 dimensional graphene-like monolayers and few-layers of transition metal dichalcogenides (TMDCs). Semiconducting monolayer TMDCs, due to the presence of a direct gap, significantly extend the potential of low-dimensional nanomaterials for applications in nanoelectronics and nano-optoelectronics as well as flexible nano-electronics with unprecedented possibilities to control the gap by external stimuli. Strong quantum confinement results in extremely high exciton binding energies which forms an interesting platform for both fundamental studies and device applications. Breaking of spatial inversion symmetry in monolayers results in strong spin-valley coupling potentially leading to their use in valleytronics. Starting with the basic chemistry of transition metals, the reader is introduced to the rich field of transition metal dichalcogenides. After a chapter on three dimensional crystals and a description of top-down and bottom-up fabrication methods of few-layer and single layer structures, the fascinating world of two-dimensional TMDCs structures is presented with their unique atomic, electronic, and magnetic properties. The book covers in detail particular features associated with decreased dimensionality such as stability and phase-transitions in monolayers, the appearance of a direct gap, large binding energy of 2D excitons and trions and their dynamics, Raman scattering associated with decreased dimensionality, extraordinarily strong light-matter interaction, layer-dependent photoluminescence properties, new physics associated with the destruction of the spatial inversion symmetry of the bulk phase, spin-orbit and spin-valley couplings. The book concludes with chapters on engineered heterostructures and device applications such as a monolayer MoS2 transistor. Considering the explosive interest in physics and applications of two-dimensional materials, this book is a valuable source of information for material scientists and engineers working in the field as well as for the graduate students majoring in materials science.
