Second-harmonic generation from CuInSe2 thin films: Influence of the substrate-epilayer lattice mismatch

D. J. Bottomley, A. Mito, P. J. Fons, S. Niki, A. Yamada

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We investigate the second-order nonlinear optical (NLO) properties of tetragonal chalcopyrite-structure CuInSe2 thin films using optical second-harmonic generation at a fundamental wavelength of 790 nm. An approximate doubling of the second-order optical nonlinearity of the CuInSe2 thin films is achieved through changing the substrate from GaAs(001) to In0.29Ga0.71As(001), thereby reducing the lattice mismatch from 2.2% to 0.2%. This observation suggests that minimizing the lattice mismatch is a key requirement for the growth of high-quality NLO active chalcopyrite structure thin films and is in contrast to some other NLO active thin-film systems.

Original languageEnglish
Pages (from-to)1294-1298
Number of pages5
JournalIEEE Journal of Quantum Electronics
Volume33
Issue number8
DOIs
Publication statusPublished - 1997 Aug 1
Externally publishedYes

Keywords

  • Birefringence
  • Nonlinear optics
  • Phase matching
  • Semiconductor defects
  • Semiconductor materials
  • Semiconductor waveguides
  • Thin films
  • X-ray measurements

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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