Spectroscopy of Nonequilibrium Electrons and Phonons
Spectroscopy of Nonequilibrium Electrons and Phonons

Author: C.V. Shank

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 513

ISBN-13: 0444600574

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The physics of nonequilibrium electrons and phonons in semiconductors is an important branch of fundamental physics that has many practical applications, especially in the development of ultrafast and ultrasmall semiconductor devices. This volume is devoted to different trends in the field which are presently at the forefront of research. Special attention is paid to the ultrafast relaxation processes in bulk semiconductors and two-dimensional semiconductor structures, and to their study by different spectroscopic methods, both pulsed and steady-state. The evolution of energy and space distribution of nonequilibrium electrons and the relaxation kinetics of hot carriers and phonons are considered under various conditions such as temperature, doping and pumping intensity by leading experts in the field.

Nonequilibrium Electrons and Phonons in Superconductors
Nonequilibrium Electrons and Phonons in Superconductors

Author: Armen M. Gulian

Publisher: Springer Science & Business Media

Published: 2005-12-16

Total Pages: 405

ISBN-13: 030647087X

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This book introduces the main concepts of nonequilibrium phenomena in superconductors. The authors cover both experimentally well-understood topics and problems which physicists could challenge more in view of current theoretical understanding. Some of these topics include thermoelectric phenomena, influence of laser radiation as well as fluctuations in superconductors.

Nonequilibrium Phonon Dynamics
Nonequilibrium Phonon Dynamics

Author: Walter E. Bron

Publisher: Springer Science & Business Media

Published: 2013-11-11

Total Pages: 682

ISBN-13: 1461325013

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Phonons are always present in the solid state even at an absolute temperature of 0 K where zero point vibrations still abound. Moreover, phonons interact with all other excitations of the solid state and, thereby, influence most of its properties. Historically experimental information on phonon transport came from measurements of thermal conductivity. Over the past two decades much more, and much more detailed, information on phonon transport and on many of the inherent phonon interaction processes have come to light from experiments which use nonequilibrium phonons to study their dynamics. The resultant research field has most recently blossomed with the development of ever more sophisticated experimental and theoretical methods which can be applied to it. In fact, the field is moving so rapidly that new members of the research community have difficulties in keeping up to date. This NATO Advanced Study Institute (ASI) was organized with the objective of overcoming the information barrier between those expert in the field and those who are new to it. Thus it was decided to (i) organize a set of tutorially based lectures covering most of the important facets in the field, and (ii) to produce an Institute proceedings which would serve both as the first general textbook, as well as a valuable reference book, for this field of knowledge.

Point-Contact Spectroscopy
Point-Contact Spectroscopy

Author: Yu.G. Naidyuk

Publisher: Springer

Published: 2019-04-04

Total Pages: 303

ISBN-13: 1475762054

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Various experimental techniques for point contact production are described. Examples of point-contact spectra are presented for pure metals, alloys and compounds, as well as for semimetals and semiconductors, heavy fermion systems, Kond-lattices, mixed valence compounds and more. Superconducting point contacts are considered in respect to Andreev reflection and Josephson effects. Special attention is paid to contact conductance fluctuation, and new trends of research are outlined.

Non-Equilibrium Dynamics of Semiconductors and Nanostructures
Non-Equilibrium Dynamics of Semiconductors and Nanostructures

Author: Kong-Thon Tsen

Publisher: CRC Press

Published: 2018-10-03

Total Pages: 241

ISBN-13: 1351836927

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The advent of the femto-second laser has enabled us to observe phenomena at the atomic timescale. One area to reap enormous benefits from this ability is ultrafast dynamics. Collecting the works of leading experts from around the globe, Non-Equilibrium Dynamics of Semiconductors and Nanostructures surveys recent developments in a variety of areas in ultrafast dynamics. In eight authoritative chapters illustrated by more than 150 figures, this book spans a broad range of new techniques and advances. It begins with a review of spin dynamics in a high-mobility two-dimensional electron gas, followed by the generation, propagation, and nonlinear properties of high-amplitude, ultrashort strain solitons in solids. The discussion then turns to nonlinear optical properties of nanoscale artificial dielectrics, optical properties of GaN self-assembled quantum dots, and optical studies of carrier dynamics and non-equilibrium optical phonons in nitride-based semiconductors. Rounding out the presentation, the book examines ultrafast non-equilibrium electron dynamics in metal nanoparticles, monochromatic acoustic phonons in GaAs, and electromagnetically induced transparency in semiconductor quantum wells. With its pedagogical approach and practical, up-to-date coverage, Non-Equilibrium Dynamics of Semiconductors and Nanostructures allows you to easily put the material into practice, whether you are a seasoned researcher or new to the field.

Optical Excitation and Probing of Nonequilibrium Phonons in Molybdenum Disulfide
Optical Excitation and Probing of Nonequilibrium Phonons in Molybdenum Disulfide

Author: Peter Cyprian Sokalski

Publisher:

Published: 2021

Total Pages: 0

ISBN-13:

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Layered transition metal dichalognides (TMDs) are being explored as next-generation electronic and optoelectronic materials due to their thickness-dependent electronic bandstructure, high mobility, and mechanical flexibility. In electronic and optoelectronic devices, electrons are energized by high electric fields and dissipate their energy via scattering with phonons, which are the energy quanta of lattice vibration. It is known that the very different coupling strengths between electrons and different phonon polarizations can result in local nonequilibrium among the different optical and acoustic phonon polarizations in both cubic phase group IV and V semiconductors and hexagonal phase monolayer graphene. In comparison, it is unclear whether similar hot phonon phenomena can occur in TMDs. This thesis reports Raman spectroscopy measurements of the electron-phonon energy dissipation processes in bulk Molybdenum Disulfide (MoS2) excited by the Raman laser beam. The population and temperature of two Raman-active optical phonon modes are obtained from the measured intensity ratios between the Stokes and anti-Stokes bands, whereas the Raman peak shift is used to determine the population and equivalent temperature of different phonon polarizations that are anharmonically coupled to the Raman-active modes. The measurement results reveal preferential heating of the optical phonons. The non-equilibrium measured with different laser beam spot sizes is used to the extract the thermalization lengths between the optical phonons and the lattice

Encyclopedia of Modern Optics
Encyclopedia of Modern Optics

Author: Bob D. Guenther

Publisher: Academic Press

Published: 2018-02-14

Total Pages: 2253

ISBN-13: 0128149825

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The Encyclopedia of Modern Optics, Second Edition, Five Volume Set provides a wide-ranging overview of the field, comprising authoritative reference articles for undergraduate and postgraduate students and those researching outside their area of expertise. Topics covered include classical and quantum optics, lasers, optical fibers and optical fiber systems, optical materials and light-emitting diodes (LEDs). Articles cover all subfields of optical physics and engineering, such as electro-optical design of modulators and detectors. This update contains contributions from international experts who discuss topics such as nano-photonics and plasmonics, optical interconnects, photonic crystals and 2D materials, such as graphene or holy fibers. Other topics of note include solar energy, high efficiency LED’s and their use in illumination, orbital angular momentum, quantum optics and information, metamaterials and transformation optics, high power fiber and UV fiber lasers, random lasers and bio-imaging. Addresses recent developments in the field and integrates concepts from fundamental physics with applications for manufacturing and engineering/design Provides a broad and interdisciplinary coverage of specialist areas Ensures that the material is appropriate for new researchers and those working in a new sub-field, as well as those in industry Thematically arranged and alphabetically indexed, with cross-references added to facilitate ease-of-use