Linear and nonlinear optical studies of indium selenide thin films prepared by thermal evaporation technique

A. S. Salwa, A. Salem*, H. T. Shaban

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The manuscript concerns linear and nonlinear optical studies of thin indium selenide films are prepared using thermal evaporation technique, which is intensively researched due to its specific characteristics. In the wavelength range, 300–2500 nm, the transmission and reflection spectrum were taken using the VIS-NIR spectrophotometer. For processed films, the nonlinear optical parameters viz. nonlinear refractive index (n2) and third order nonlinear susceptibilities χ 3have been tested by numerical calculation. The optical band gaps obtained from Tauc's relationship for direct and indirect transitions are within the scope of 3.6 −1.9 eV and 1.55–1.1 eV, respectively, and the band gap expanded with film thickness decreases.

Original languageEnglish
Article number166874
JournalOptik
Volume241
DOIs
StatePublished - Sep 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier GmbH

Keywords

  • Absorption coefficient
  • Direct energy gap
  • Linear optical susceptibility
  • Nonlinear refractive index
  • Optical properties of InSe
  • Thermal evaporated thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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