Laser gain spectra of quantum wells and multiplasmon optical transitions

A novel multi-plasmon concept of a light absorption and laser gain of low-dimensional structures are comprehensively discussed. A Generalized Semiconductor Bloch Equations are derived with account of multi-plasmon optical transitions in direct gap quantum wells, using the cumula...

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Autor principal:	Gurău, Virginia
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2005
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/21427e1d33d0407ba011467bdaeb7cd1
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spelling	oai:doaj.org-article:21427e1d33d0407ba011467bdaeb7cd12021-11-21T12:13:43ZLaser gain spectra of quantum wells and multiplasmon optical transitions2537-63651810-648Xhttps://doaj.org/article/21427e1d33d0407ba011467bdaeb7cd12005-01-01T00:00:00Zhttps://mjps.nanotech.md/archive/2005/article/3083https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365A novel multi-plasmon concept of a light absorption and laser gain of low-dimensional structures are comprehensively discussed. A Generalized Semiconductor Bloch Equations are derived with account of multi-plasmon optical transitions in direct gap quantum wells, using the cumulant expansion method and fluctuation-dissipation theorem. We present results of computer simulations concerning gain spectra of In0.05Ga0.95As quantum wells with account of multi- plasmon optical transitions in two- dimensional systems. Multi-quantum LO-phonon-plasmon optical transitions are investigated with account of coherent memory effects in quantum wells. It is shown that a red shift of the absorption edge can be caused, not only by known mechanism of band gap shrinkage, but also by multi-plasmon transitions. The electron-hole plasma properties in the active region of the laser device and its interaction with the optical field are studied on a microscopic level using obtained Generalized Semiconductor Bloch Equations. The comparison with other theories and experimental data measured in In0.05Ga0.95As quantum wells is performed. The gain value g=50 cm-1 in 8 nm In 0.05Ga 0.95As quantum wells is obtained at a surface density of electrons nd0=1.64 10-12 cm-2 . Gurău, VirginiaD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 4, Iss 1, Pp 119-124 (2005)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 Gurău, Virginia Laser gain spectra of quantum wells and multiplasmon optical transitions
description	A novel multi-plasmon concept of a light absorption and laser gain of low-dimensional structures are comprehensively discussed. A Generalized Semiconductor Bloch Equations are derived with account of multi-plasmon optical transitions in direct gap quantum wells, using the cumulant expansion method and fluctuation-dissipation theorem. We present results of computer simulations concerning gain spectra of In0.05Ga0.95As quantum wells with account of multi- plasmon optical transitions in two- dimensional systems. Multi-quantum LO-phonon-plasmon optical transitions are investigated with account of coherent memory effects in quantum wells. It is shown that a red shift of the absorption edge can be caused, not only by known mechanism of band gap shrinkage, but also by multi-plasmon transitions. The electron-hole plasma properties in the active region of the laser device and its interaction with the optical field are studied on a microscopic level using obtained Generalized Semiconductor Bloch Equations. The comparison with other theories and experimental data measured in In0.05Ga0.95As quantum wells is performed. The gain value g=50 cm-1 in 8 nm In 0.05Ga 0.95As quantum wells is obtained at a surface density of electrons nd0=1.64 10-12 cm-2 .
format	article
author	Gurău, Virginia
author_facet	Gurău, Virginia
author_sort	Gurău, Virginia
title	Laser gain spectra of quantum wells and multiplasmon optical transitions
title_short	Laser gain spectra of quantum wells and multiplasmon optical transitions
title_full	Laser gain spectra of quantum wells and multiplasmon optical transitions
title_fullStr	Laser gain spectra of quantum wells and multiplasmon optical transitions
title_full_unstemmed	Laser gain spectra of quantum wells and multiplasmon optical transitions
title_sort	laser gain spectra of quantum wells and multiplasmon optical transitions
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2005
url	https://doaj.org/article/21427e1d33d0407ba011467bdaeb7cd1
work_keys_str_mv	AT gurauvirginia lasergainspectraofquantumwellsandmultiplasmonopticaltransitions
_version_	1718419112284127232

Laser gain spectra of quantum wells and multiplasmon optical transitions

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