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Author: G. Abstreiter
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 404
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Book Description
Proceedings of a September 1996 meeting, in sections on quantum films and superlattices, quantum wires, and quantum dots. Coverage includes basic physics aspects, novel technology and material fabrication tools, characterization methods, and new devices, with special attention to quantum wire and quantum dot lasers. Specific topics include inelastic light scattering by electrons in low-dimensional semiconductors, band-gap renormalization in quasi-one-dimensional systems, conductance in nanowires, and fabrication of quantum dots for semiconductor lasers with confined electrons and photons. Annotation copyrighted by Book News, Inc., Portland, OR
Author: G. Abstreiter
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 404
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Book Description
Proceedings of a September 1996 meeting, in sections on quantum films and superlattices, quantum wires, and quantum dots. Coverage includes basic physics aspects, novel technology and material fabrication tools, characterization methods, and new devices, with special attention to quantum wire and quantum dot lasers. Specific topics include inelastic light scattering by electrons in low-dimensional semiconductors, band-gap renormalization in quasi-one-dimensional systems, conductance in nanowires, and fabrication of quantum dots for semiconductor lasers with confined electrons and photons. Annotation copyrighted by Book News, Inc., Portland, OR
Author: Marco van der Laan
Publisher:
ISBN: 9789464735093
Category :
Languages : en
Pages : 0
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Book Description
"In dit proefschrift, 'Optical Spectroscopy of Low-Dimensional Semiconductors', worden de opto-elektronische eigenschappen onderzocht van specifieke laagdimensionale halfgeleiders; perovskiet nanokristallen (NCs), overgangs-metaaldichalcogeniden (TMDCs) en combinaties daarvan. Door hun uitstekende eigenschappen, zoals emissie-efficiëntie en ladingsdragermobiliteit, zijn deze materialen interessante kandidaten voor opto-elektronische apparaten van de volgende generatie. We bestuderen deze eigenschappen van halfgeleiders met optische spectroscopietechnieken, zoals (tijdsafhankelijke) fotoluminescentiespectroscopie, Raman spectroscopie en pomp-sonde absorptiespectroscopie. De hoofdstukken in dit proefschrift onderzoeken ook deze gebonden toestanden en hun absorptie- en emissie-eigenschappen. Specifiek, worden hier resultaten uiteengezet over de energie uitwisseling, door middel van licht, tussen nanokristallen van CsPbBr3. Latere hoofdstukken behandelen de studie van gebonden elektronische toestanden in de twee-dimensionale materialen MoS2 en ReS2 door middel van verscheidene optische technieken. De resultaten besproken in dit proefschrift werpen nieuw licht op de optische en elektronische eigenschappen van nieuwe laagdimensionale materialen. De bevindingen dragen bij aan een beter begrip van halfgeleiders en hun toepassing in toekomstige apparaten."--
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 725
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Book Description
Author: Eougenious L. Ivchenko
Publisher: Alpha Science Int'l Ltd.
ISBN: 9781842651506
Category : Science
Languages : en
Pages : 444
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Book Description
This volume looks at optical spectroscopy of semiconductir nanostructures. Some of the topics it covers include: kingdom of nanostructures; quantum confinement in low-dimensional systems; resonant light reflection; and transmission and absorption.
Author: M. Balkanski
Publisher: Springer Science & Business Media
ISBN: 9400902891
Category : Science
Languages : en
Pages : 417
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Book Description
Low-dimensional semiconductor quantum structures are a major, high-technological development that has a considerable industrial potential. The field is developing extremely rapidly and the present book represents a timely guide to the latest developments in device technology, fundamental properties, and some remarkable applications. The content is largely tutorial, and the book could be used as a textbook. The book deals with the physics, fabrication, characteristics and performance of devices based on low-dimensional semiconductor structures. It opens with fabrication procedures. The fundamentals of quantum structures and electro-optical devices are dealt with extensively. Nonlinear optical devices are discussed from the point of view of physics and applications of exciton saturation in MQW structures. Waveguide-based devices are also described in terms of linear and nonlinear coupling. The basics of pseudomorphic HEMT technology, device physics and materials layer design are presented. Each aspect is reviewed from the elementary basics up to the latest developments. Audience: Undergraduates in electrical engineering, graduates in physics and engineering schools. Useful for active scientists and engineers wishing to update their knowledge and understanding of recent developments.
Author: Wei Bao
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Book Description
The necessity to push the spatial resolution of optical microscopy and spectroscopy beyond the diffraction limit has been of high interest for almost three decades starting with the idea of using an aperture smaller than the diffraction limit by Ash and Nicholls (Nature 237, 510 - 512) and first examples on nano spectroscopy by Betzig and Trautman (Science 257, 189-195), who advertised: "two of the most exciting possibilities are localized optical spectroscopy of semiconductors and fluorescence imaging of living cells". However, albeit its enormous potential for the advancement of nano science to study at the critical length scales physical and chemical properties of nano materials that can be accessed only optically, nano optics has developed only a niche existence. The reasons are many limitations of present nano optics, which advanced specific aspects e.g. high local field intensity via the concept of optical antennae (Science 308, 1607-1609) but with major trade offs such as lack of band width, background of diffraction limited light or intrinsic geometries that enable only the study of e.g. monolayers of molecules squeezed between metal substrate and a metal tip. Here we present a wildly applicable solution to the nanoscale spectroscopy problem with the concept of a far-field to near field optical transformer that does not require the trade offs made in the past and combines record near field enhancement, enormous bandwidth, background free and complete sample independence to perform nano scale optical spectroscopy. The "campanile" transformer is the missing element that enables to perform the whole bandwidth of optical spectroscopy modalities. In the first part of this thesis, the finite element method is used compare the properties of this "campanile" structure with conventional aperture and apertureless NSOM tips, as well as state-of-the-art adiabatic-compression-type probes. These benchmarks elucidate a number of advantages of the campanile design, showing that its unique characteristics are crucial for optical techniques such as nano-Raman and nano-IR spectroscopy and nano-photoluminescence studies. In the second part of the thesis, we have experimentally used the campanile transformer to perform indeed local optical spectroscopy of semiconducting Indium Phosphite nanowires (InP NW),1D semiconductor, taking advantage of enhancement, bandwidth as well as the ability to excite and collect through the campanile, to show the influence of trap states on the local excitation energy and charge recombination rate. InP NWs have fascinating opto-electronic properties (Science 293, 1455-1457) and are expected to be the functional elements of next generation opto-electronic devices. However, many of the observed optical phenomena in nanowire systems are not understood due to the lack of spatial resolution. This work provides the necessary insight to start understanding the optical properties of nanowire and nano crystals systems. We demonstrate how the concept of optical campanile transformers convert bi-directional light with high efficiency between far and near field over a bandwidth spanning the visible to the near IR. Utilizing the campanile to perform hyperspectral nano optical spectroscopy on InP NWs revealed strong heterogeneity of the local photoluminescence, both in local intensity and spectral response, along individual NWs, due to the local influence of trap states. In the last part of the thesis, we present the first nano-optical investigation of 2D transition metal dichalcogenides (TMDCs). Establishing a breakthrough solution to the "nanospectroscopy imaging" problem for these materials, we cross the boundary from insufficient to sufficient optical spatial resolution, mapping critical optoelectronic properties at their native length scales. In doing so, we uncover new optoelectronic regions and spatially-varying features in CVD-grown MoS2 that were hidden in prior optical studies. We discover an unexpected edge region in synthetic MoS2 (~300 nm wide) that acts as a collection of disordered states effectively localizing carriers and excitons. Moreover, we show that significant nanoscale optoelectronic heterogeneity is present even within more "conventional" regions, and directly visualize the optoelectronic effects of key features such defects and edges - highly-soughtafter information that was unobtainable previously. By revealing key structure-function relationships at the proper length scales, these findings directly impact nearly all anticipated atomically-thin device technologies including novel quantum-optical circuitry, bio sensors and valley-based electronics.
Author: Stephan Glutsch
Publisher: Springer Science & Business Media
ISBN: 3662071509
Category : Science
Languages : en
Pages : 302
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Book Description
The author develops the effective-mass theory of excitons in low-dimensional semiconductors and describes numerical methods for calculating the optical absorption including Coulomb interaction, geometry, and external fields. The theory is applied to Fano resonances in low-dimensional semiconductors and the Zener breakdown in superlattices. Comparing theoretical results with experiments, the book is essentially self-contained; it is a hands-on approach with detailed derivations, worked examples, illustrative figures, and computer programs. The book is clearly structured and will be valuable as an advanced-level self-study or course book for graduate students, lecturers, and researchers.
Author: Paul N. Butcher
Publisher: Springer Science & Business Media
ISBN: 1489924159
Category : Science
Languages : en
Pages : 597
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Book Description
Presenting the latest advances in artificial structures, this volume discusses in-depth the structure and electron transport mechanisms of quantum wells, superlattices, quantum wires, and quantum dots. It will serve as an invaluable reference and review for researchers and graduate students in solid-state physics, materials science, and electrical and electronic engineering.
Author: B. Bensahel
Publisher: Springer Science & Business Media
ISBN: 9401120927
Category : Science
Languages : en
Pages : 245
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Book Description
The workshop on "Optical Properties of Low Dimensional Silicon sL Structures" was held in Meylan, France on March, I yd, 1993. The workshop took place inside the facilities of France Telecom- CNET. Around 45 leading scientists working on this rapidly moving field were in attendance. Principal support was provided by the Advanced Research Workshop Program of the North Atlantic Treaty Organisation (NATO). French Delegation a l'Armement and CNET gave also a small financial grant, the organisational part being undertaken by the SEE and CNET. There is currently intense research activity worldwide devoted to the optical properties of low dimensional silicon structures. This follow the recent discovery of efficient visible photoluminescence (PL) from highly porous silicon. This workshop was intended to bring together all the leading European scientists and laboratories in order to reveal the state of the art and to open new research fields on this subject. A large number of invited talks took place (12) together with regular contribution (20). The speakers were asked to leave nearly 1/3 of the time to the discussion with the audience, and that promoted both formal and informal discussions between the participants.
Author: Joshua D. Wood
Publisher:
ISBN:
Category : Semiconductors
Languages : en
Pages : 146
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Book Description
