Optical properties of lithium thioindate

J. Mangin, S. Salaün, S. Fossier, P. Strimer, J. J. Zondy, L. Isaenko, A. Yelisseyev

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The optical properties of LiInS2 suggested it as a promising material for generation of coherent radiation in the mid-IR region. Before investigating such capabilities its optical and mechanical properties have to be characterized precisely, and especially their evolution with temperature. Sufficiently large and suitably oriented crystals of good optical quality were studied. We first deduced the transparency range of these samples, as well as the frequencies of the optical phonons. We observed a phase-matched second-harmonic generation, using a nanosecond-OPO in the range 2.4-2.6 microns as the pump source and estimated a first value of the type-II nonlinearity deff(XY)=7.4pm/V. The thermal expansion, thermo-optic, piezoelectric and electro-optic coefficients were determined along the three principal directions of polarization from -20°C up to +120°C by means of original interferometric methods. A so-called Fabry-Perot Thermal Scanning (FPTS) interferometric method has been developed to measure accurately the electro-optic coefficients. For LiInS2 the values of ri3 were found to be of the same order of magnitude as its piezoelectric coefficients, but around one order of magnitude smaller than the electro-optic coefficients of the well known KTiOPO4.

Original languageEnglish
Pages (from-to)49-57
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4268
DOIs
Publication statusPublished - Jan 1 2001
Externally publishedYes

Keywords

  • Nonlinear optical materials - Electro-optic coefficients

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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