Photo-thermovoltaic effects induced by CO2 laser illumination of PbTe-metal junctions

S. Ašmontas, Z. Dashevsky, M. P. Dariel, J. Gradauskas, A. Jarashneli, S. Shusterman, A. Sužiedėlis, G. Valušis

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Our study is concerned with the photo-thermovoltaic effects caused by the absorption of CO2 laser light in narrow gap AIVBVI semiconductors. We report on results of experimental study of photoresponse induced in n-type and p-type lead telluride with Ni contacts. We show that in the case of ohmic contacts (n-PbTe-Ni and p-PbTe-Ni at 300K) the detected signal originates from thermoemf due to created crystal lattice temperature gradient. In the case of p-PbTe-Ni at 80K we have Schottky contacts and the photoresponse consists at least of two components: fast and great in value photoemf-due to career generation resulting from two-photon absorption, and slow as well as of lower magnitude thermoemf.

Original languageEnglish
Pages (from-to)230-234
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4318
DOIs
StatePublished - 1 Jan 2001

Keywords

  • Detection
  • Infrared
  • Lead telluride
  • Thermoemf
  • Two-photon absorption

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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