Influence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films

The experimental investigation of the influence of the light irradiation and heat treatment on the optical parameters of one of highest sensitive chalcogenide glass As45S15Se40 was investigated. For the amorphous As45S15Se40 thin films prepared by „flash” thermal evaporation, from the transmission s...

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Autores principales:	Iovu, Mihail, Benea, Vasile, Colomeico, Eduard, Cojocaru, Ion
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2011
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/6c822a1c3d8442b78c1dfdbab0f9eb65
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spelling	oai:doaj.org-article:6c822a1c3d8442b78c1dfdbab0f9eb652021-11-21T12:01:57ZInfluence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films2537-63651810-648Xhttps://doaj.org/article/6c822a1c3d8442b78c1dfdbab0f9eb652011-08-01T00:00:00Zhttps://mjps.nanotech.md/archive/2011/article/21344https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365The experimental investigation of the influence of the light irradiation and heat treatment on the optical parameters of one of highest sensitive chalcogenide glass As45S15Se40 was investigated. For the amorphous As45S15Se40 thin films prepared by „flash” thermal evaporation, from the transmission spectra the value of the refractive index n was found n = 2.921 at λ = 650 nm, and the optical band gap Eg was determined from the Tauc plot Eg = 1.929 eV. From the dispersion curves of the refractive index n = f(λ) and (n2-1)-1 = f(hv), by fitting a straight line to the experimental points, the single-oscillator energy E0 and the dispersion energy of oscillator strength Ed were estimated. The kinetics of photodarkening in amorphous As45S15Se40 thin films is described by a stretch exponential function, and the effect at illumination with laser beam λ = 540 nm is more pronounced than in amorphous As2S3 and As2Se3 films. The maximum of the diffraction efficiency λ of the holografical gratings recorded during the exposure of laser beam at λ = 540 nm is reached at about t = 250 s.Iovu, MihailBenea, VasileColomeico, EduardCojocaru, IonD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 10, Iss 3-4, Pp 275-283 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 Iovu, Mihail Benea, Vasile Colomeico, Eduard Cojocaru, Ion Influence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films
description	The experimental investigation of the influence of the light irradiation and heat treatment on the optical parameters of one of highest sensitive chalcogenide glass As45S15Se40 was investigated. For the amorphous As45S15Se40 thin films prepared by „flash” thermal evaporation, from the transmission spectra the value of the refractive index n was found n = 2.921 at λ = 650 nm, and the optical band gap Eg was determined from the Tauc plot Eg = 1.929 eV. From the dispersion curves of the refractive index n = f(λ) and (n2-1)-1 = f(hv), by fitting a straight line to the experimental points, the single-oscillator energy E0 and the dispersion energy of oscillator strength Ed were estimated. The kinetics of photodarkening in amorphous As45S15Se40 thin films is described by a stretch exponential function, and the effect at illumination with laser beam λ = 540 nm is more pronounced than in amorphous As2S3 and As2Se3 films. The maximum of the diffraction efficiency λ of the holografical gratings recorded during the exposure of laser beam at λ = 540 nm is reached at about t = 250 s.
format	article
author	Iovu, Mihail Benea, Vasile Colomeico, Eduard Cojocaru, Ion
author_facet	Iovu, Mihail Benea, Vasile Colomeico, Eduard Cojocaru, Ion
author_sort	Iovu, Mihail
title	Influence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films
title_short	Influence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films
title_full	Influence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films
title_fullStr	Influence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films
title_full_unstemmed	Influence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films
title_sort	influence of light irradition and heat treatment on the optical properties of amorphous as45s15se40 thin films
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2011
url	https://doaj.org/article/6c822a1c3d8442b78c1dfdbab0f9eb65
work_keys_str_mv	AT iovumihail influenceoflightirraditionandheattreatmentontheopticalpropertiesofamorphousas45s15se40thinfilms AT beneavasile influenceoflightirraditionandheattreatmentontheopticalpropertiesofamorphousas45s15se40thinfilms AT colomeicoeduard influenceoflightirraditionandheattreatmentontheopticalpropertiesofamorphousas45s15se40thinfilms AT cojocaruion influenceoflightirraditionandheattreatmentontheopticalpropertiesofamorphousas45s15se40thinfilms
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Influence of light irradition and heat treatment on the optical properties of amorphous As45S15Se40 thin films

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