Journal ArticleDOI
Effects of a Gaussian size distribution on the absorption spectra of III-V semiconductor quantum dots
Subindu Kumar,Dipankar Biswas +1 more
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TLDR
In this paper, the absorption spectra of realistic QD systems with dot size distribution described by a Gaussian function were formulated and compared with ideal dot having infinite potentials at the boundaries.Abstract:
The advancement in the fabrication of low-dimensional semiconductor structures has made it possible to grow zero-dimensional electron-hole systems called quantum dots (QDs). In recent years, there have been extensive studies on III-V semiconductor QDs. In this paper, we have formulated the absorption spectra of realistic QD systems with dot size distribution described by a Gaussian function. The dots were approximated as cubic boxes having finite potentials at the boundaries. The effects of size nonuniformity on the optical absorption spectra of few realistic QD systems were analyzed, and the results have been compared with ideal dots having infinite potentials at the boundaries.read more
Citations
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Journal ArticleDOI
Effect of quantum dot size and size distribution on the intersublevel transitions and absorption coefficients of III-V semiconductor quantum dot
Sanjib Kabi,A. G. Unil Perera +1 more
TL;DR: In this article, the intersublevel absorption peak energy and absorption coefficient of non-uniform quantum dot ensembles are calculated analytically and the effect of size variations and size distribution of QDs on their energy states is analyzed.
Journal ArticleDOI
Relation between size dispersion and line shape in quantum dot ensembles
V. V. Nikolaev,N. S. Averkiev +1 more
TL;DR: In this paper, the density of optical transitions, absorption, and differential absorption spectra of quantum dot ensembles is modeled using a Gaussian-peak model with a preside account of the influence of size dispersion on the line shape of quantum dots.
Journal ArticleDOI
Effect of size distribution on the optical properties of quantum wire systems
R. Khordad,H. Bahramiyan +1 more
TL;DR: In this article, the optical properties of an inhomogeneous quantum wire system were studied and the effect of size variation on these optical properties was investigated. But the authors considered the wires are considered to be triangle with infinite potential at the boundaries and the size nonuniformity distribution by a Gaussian function.
Journal ArticleDOI
Computations of the optical transitions and absorption spectra in a set of realistic, elongated InAs/GaAs quantum boxes having a Gaussian distribution
TL;DR: In this paper, the optical transitions and absorption spectra of InAs/GaAs quantum dots are computed for short quantum wires with a square base and the variation of the height is Gaussian.
Journal ArticleDOI
Ballistic phonon transport through gaussian acoustic nanocavities
TL;DR: In this paper, the authors investigated ballistic phonon transport through Gaussian acoustic nanocavities in a semiconductor nanowire at low temperatures and found that wide band gap and resonant peaks appeared in transmission spectra.
References
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Book
Introduction to Quantum Mechanics
TL;DR: A new chapter on symmetries, new problems and examples, improved explanations, more numerical problems to be worked on a computer, new applications to solid state physics, and consolidated treatment of time-dependent potentials as discussed by the authors.
Book
Quantum dot heterostructures
TL;DR: In this paper, the growth and structural characterisation of self-organized Quantum Dots are discussed. But they do not consider the model of ideal and real quantum Dots.
Journal ArticleDOI
Gain and the threshold of three-dimensional quantum-box lasers
TL;DR: In this article, the electronic dipole moment and its polarization dependence are analyzed, and it is shown that the gain becomes maximum when the electric field of light is parallel to the longest side of the quantum box.
Journal ArticleDOI
Optically detected carrier confinement to one and zero dimension in GaAs quantum well wires and boxes
TL;DR: In this article, a carrier confinement to one and zero degrees of freedom has been achieved in artificial quantum well wires and boxes fabricated in the GaAs•GaAlAs system, which is attributed to transitions arising from ground and excited levels of electrons within these low dimensional structures.
Journal ArticleDOI
Quantum dot infrared photodetectors
TL;DR: In this paper, the authors used state-filling photoluminescence experiments to probe the zero-dimensional states and revealed four atomic-like shells (s,p,d,f) with an excitonic inter-sublevel energy spacing which was adjusted to ∼60 meV.
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