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Exciton mixing in quantum wells
Physical Review B, 1988An effective-mass theory of the properties of excitons in isolated GaAs/${\mathrm{Al}}_{\mathrm{x}}$${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathrm{x}}$As quantum wells is presented. The phenomenon of exciton mixing induced by the complicated valence-band structure is emphasized.
, Bauer, , Ando
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Terahertz Quantum Well Photodetectors
IEEE Journal of Selected Topics in Quantum Electronics, 2006The terahertz (THz) part of the electromagnetic spectrum promises a wide range of new and novel, some may be disruptive, applications. However, the development of technologies in the THz spectrum or the very far infrared region has been slow mainly because of the lack of convenient detectors and lasers.
H. Luo +5 more
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Femtosecond dynamics of excitons in quantum wells and quantum well microcavities
physica status solidi (b), 1995AbstractInvestigations of femtosecond dynamics of excitons in two different regimes are reported: 1. perturbative or weak coupling regime where the exciton decay is irreversible (i.e. excitons in quantum wells), and 2. non‐perturbative or strong coupling regime (i.e.
H. Wang +4 more
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Deuterium in In-based quantum wells
Superlattices and Microstructures, 1994Abstract The photoluminescence (PL) of high quality InGaAs/GaAs typically shows one strong intrinsic band, due to the heavy-bole free-exciton (HHFE) recombination. After sample irradiation with deuterium, two bands appear at energies below that of HHFE: a deeper band, D, due to radiative recombination at a deuterium-related site, and a shallower band,
CAPIZZI, Mario +5 more
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Excitons in diffused quantum wells
Physical Review B, 1993The Schr\"odinger equation corresponding to the potential profile resulting from manganese diffusion in CdTe-${\mathrm{Cd}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Mn}}_{\mathit{x}}$Te quantum wells has been solved using a numerical method. Calculation of the exciton binding energies has allowed predictions of the effect of diffusion on the ...
, Harrison, , Hagston, , Stirner
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Excitons in double quantum wells
Physical Review B, 1989On etudie les excitons d'une structure a puits quantiques doubles consistant en deux puits separes par une barriere mince. On calcule les energies de liaison et les forces d'oscillateurs de l'etat fondamental des excitons en fonction des largeurs de barriere et de puits.
, Kamizato, , Matsuura
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Terahertz quantum-well photodetectors
Infrared Physics & Technology, 2004The design and projected performance of quantum-well infrared photodetectors (QWIP) for the terahertz (1–10 THz) or the very-far-infrared region are presented together with our initial demonstration of a GaAs/AlGaAs QWIP working at photon energies below the optical phonons. We point out the problem with this initial device, discuss possible causes, and
Liu, Hui +3 more
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Phonons in parabolic quantum wells
Physical Review B, 1993Phonons in parabolic-quantum-well structures fabricated with semiconductor alloys are studied. We calculate frequencies, displacement patterns, and densities of states for lattice vibrations in a (GaAs${)}_{\mathit{N}1}$(${\mathrm{Ga}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Al}}_{\mathit{x}}$As${)}_{\mathit{N}2}$(001) superlattice where the ...
, Bechstedt, , Grille, , Haupt
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Quantum wells as linear modulators
Nuclear Physics B - Proceedings Supplements, 1998In this paper we propose the use of a recently developed quantum wells device as an optical modulator to transmit an analog signal across an optical fiber link. In the proposed configuration, the device has several advantages with respect to other light modulators, the most important being the ability to transmit a current signal with a very high ...
CARRARESI L. +5 more
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