Interband absorption of light in bismuth nanostructures

Interband absorption of light in bismuth nanostructures has been studied in the framework of a complex model for electron spectrum of Bi, such as the Cohen model, the Abrikosov-Falkovsky model, and the McClure model. The obtained results differ qualitatively from those obtained in the framework of s...

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Autor principal:	Mustafaev, N.
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2012
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/416bf5d1091c4eaaa2b948a3af6e414f
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spelling	oai:doaj.org-article:416bf5d1091c4eaaa2b948a3af6e414f2021-11-21T12:01:21ZInterband absorption of light in bismuth nanostructures2537-63651810-648Xhttps://doaj.org/article/416bf5d1091c4eaaa2b948a3af6e414f2012-10-01T00:00:00Zhttps://mjps.nanotech.md/archive/2012/article/21326https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365Interband absorption of light in bismuth nanostructures has been studied in the framework of a complex model for electron spectrum of Bi, such as the Cohen model, the Abrikosov-Falkovsky model, and the McClure model. The obtained results differ qualitatively from those obtained in the framework of simple band models, such as the parabolic band model and the Lax two-band model. It is shown that both the interband transition with quantum number conservation and the interband transition without quantum number conservation are allowed in the framework of complex models for electron energy spectrum of Bi. Due to the interband transitions without quantum number conservation (these transitions are forbidden in simple band models), the peak of optical absorption in measured spectra can occur at lower photon energies than in the spectra simulated in the framework of simple band models. A similar difference between the peaks was observed by Black et al. in Bi nanowires. The interband transitions without quantum number conservation substantially complicate the oscillation pattern and the identification of absorption peaks. The frequency dependence of the coefficient of interband absorption calculated in the framework of the McClure model has pronounced peaks, whereas in the simple band models this dependence has a step-like pattern. It is concluded that the McClure model enables the oscillation behavior of interband absorption in bismuth nanostructures to be properly described.Mustafaev, N.D.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 11, Iss 3, Pp 235-242 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 Mustafaev, N. Interband absorption of light in bismuth nanostructures
description	Interband absorption of light in bismuth nanostructures has been studied in the framework of a complex model for electron spectrum of Bi, such as the Cohen model, the Abrikosov-Falkovsky model, and the McClure model. The obtained results differ qualitatively from those obtained in the framework of simple band models, such as the parabolic band model and the Lax two-band model. It is shown that both the interband transition with quantum number conservation and the interband transition without quantum number conservation are allowed in the framework of complex models for electron energy spectrum of Bi. Due to the interband transitions without quantum number conservation (these transitions are forbidden in simple band models), the peak of optical absorption in measured spectra can occur at lower photon energies than in the spectra simulated in the framework of simple band models. A similar difference between the peaks was observed by Black et al. in Bi nanowires. The interband transitions without quantum number conservation substantially complicate the oscillation pattern and the identification of absorption peaks. The frequency dependence of the coefficient of interband absorption calculated in the framework of the McClure model has pronounced peaks, whereas in the simple band models this dependence has a step-like pattern. It is concluded that the McClure model enables the oscillation behavior of interband absorption in bismuth nanostructures to be properly described.
format	article
author	Mustafaev, N.
author_facet	Mustafaev, N.
author_sort	Mustafaev, N.
title	Interband absorption of light in bismuth nanostructures
title_short	Interband absorption of light in bismuth nanostructures
title_full	Interband absorption of light in bismuth nanostructures
title_fullStr	Interband absorption of light in bismuth nanostructures
title_full_unstemmed	Interband absorption of light in bismuth nanostructures
title_sort	interband absorption of light in bismuth nanostructures
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2012
url	https://doaj.org/article/416bf5d1091c4eaaa2b948a3af6e414f
work_keys_str_mv	AT mustafaevn interbandabsorptionoflightinbismuthnanostructures
_version_	1718419298486059008

Interband absorption of light in bismuth nanostructures

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