Optimization of linear and nonlinear optical parameters in As40Se60 film by annealing at different temperature

Sahoo, D and Priyadarshini, P and Dandela, R and Alagarasan, D and Ganesan, R and Varadharajaperumal, S and Naik, R (2020) Optimization of linear and nonlinear optical parameters in As40Se60 film by annealing at different temperature. In: Optik, 219 .

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Abstract

The present research reports the influence of different annealing temperature on the linear and nonlinear optical response of thermally evaporated 800 nm As40Se60 thin films. The optical parameters were deduced from the transmittance and reflectance spectra using spectrophotometric measurements in the range 500–1000 nm. The heat treatment is found to be significantly enhanced both linear and nonlinear refractive index as well as absorption coefficient. The optical bandgap is found to be systematically decreased with annealing temperature. The large covalently bonded molecules of the films were seemingly favourable for the increase of nonlinear optical susceptibility. The developments of linear, nonlinear optical parameters, as well as the optical conductivity by annealing process, infers that annealing temperature can be considered as a useful factor for controlling the optical properties of the As40Se60 chalcogenide film which could be candidate for numerous photonic applications. The structural study was done by X-ray diffraction and Raman spectroscopy.

Item Type:	Journal Article
Publication:	Optik
Publisher:	Elsevier GmbH
Additional Information:	The copyright for this article belongs to Elsevier GmbH.
Keywords:	Annealing; Arsenic compounds; Nonlinear optics; Optical conductivity; Optical variables control; Refractive index; Selenium compounds; Thin films, Absorption co-efficient; Annealing temperatures; Nonlinear optical parameters; Nonlinear optical response; Nonlinear optical susceptibilities; Nonlinear refractive index; Spectrophotometric measurements; Transmittance and reflectances, Optical films
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	13 Feb 2023 10:17
Last Modified:	13 Feb 2023 10:17
URI:	https://eprints.iisc.ac.in/id/eprint/80211

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