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Proceedings Paper

Photothermovoltaic effects induced by CO2 laser illumination of PbTe-metal junctions
Author(s): Steponas P. Asmontas; Z. Dashevsky; M. P. Dariel; Jonas Gradauskas; A. Jarashneli; S. Shusterman; Algirdas Suziedelis; Gintaras Valusis
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Paper 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 originated 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 carrier generation resulting from two-photon absorption, and slow as well as of lower magnitude thermoemf.

Paper Details

Date Published: 8 March 2001
PDF: 5 pages
Proc. SPIE 4318, Smart Optical Inorganic Structures and Devices, (8 March 2001); doi: 10.1117/12.417602
Show Author Affiliations
Steponas P. Asmontas, Semiconductor Physics Institute (Lithuania)
Z. Dashevsky, Ben-Gurion Univ. of the Negev (Israel)
M. P. Dariel, Ben-Gurion Univ. of the Negev (Israel)
Jonas Gradauskas, Semiconductor Physics Institute (Lithuania)
A. Jarashneli, Ben-Gurion Univ. of the Negev (Israel)
S. Shusterman, Ben-Gurion Univ. of the Negev (Israel)
Algirdas Suziedelis, Semiconductor Physics Institute (Lithuania)
Gintaras Valusis, Semiconductor Physics Institute (Lithuania)

Published in SPIE Proceedings Vol. 4318:
Smart Optical Inorganic Structures and Devices
Steponas P. Asmontas; Jonas Gradauskas, Editor(s)

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