Photoresponse of Metal-PbTe Structures to CO2 Laser Excitation

  • Jonas GRADAUSKAS Center for Physical Sciences and Technology, Vilnius Gediminas Technical University
  • Steponas AŠMONTAS Center for Physical Sciences and Technology
  • Edmundas ŠIRMULIS Center for Physical Sciences and Technology
  • Algirdas SUŽIEDĖLIS Center for Physical Sciences and Technology, Vilnius Gediminas Technical University
  • Aurimas ČERŠKUS Center for Physical Sciences and Technology, Vilnius Gediminas Technical University
  • Benas KUNDROTAS Center for Physical Sciences and Technology, Vilnius Gediminas Technical University
  • Roma RINKEVIČIENĖ Vilnius Gediminas Technical University
  • Zinovy DASHEVSKY Ben-Gurion University of the Negev
  • Vladimir KASIYAN Ben-Gurion University of the Negev
Keywords: Schottky contact, narrow band gap semiconductor, lead telluride, CO2 laser, detection

Abstract

We report on the investigation of photoresponse signal arising across metal-PbTe structures exposed to CO2 laser radiation. Three different metals, Al, Au, and Bi, have been used for Schottky diode-like structure fabrication. The experimental investigations of the photoresponse have been performed in temperature range from 240 K down to 92 K. The dependencies of the detected signal on the applied bias voltage and the signal decay transients were explored as well. Hot carrier effect as well as electron-hole pair generation are considered to be responsible for the photoresponse.

DOI: http://dx.doi.org/10.5755/j01.ms.20.2.6222

Author Biographies

Jonas GRADAUSKAS, Center for Physical Sciences and Technology, Vilnius Gediminas Technical University
prof.
Steponas AŠMONTAS, Center for Physical Sciences and Technology
prof.
Algirdas SUŽIEDĖLIS, Center for Physical Sciences and Technology, Vilnius Gediminas Technical University
prof.
Roma RINKEVIČIENĖ, Vilnius Gediminas Technical University
prof.
Zinovy DASHEVSKY, Ben-Gurion University of the Negev
prof.
Published
2014-06-13
Section
ELECTRONIC AND OPTICAL MATERIALS