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Proceedings Paper

Energy structure and micromechanism of photo-EMF effect in adaptive IR-detectors based on CdTe:V crystals
Author(s): Yu. P. Gnatenko; M. S. Brodyn; I. O. Faryna; P. M. Bukivskij; O. A. Shigiltchoff; M. S. Furyer; R. V. Gamernyk; N. Kukhtarev; T. Kukhtareva
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Paper Abstract

For the first time the photo-EMF measurements were carried out for CdTe crystals doped with V atoms as a result of the photogeneration of carriers from deep impurity centers to the conduction band and the tilted geometry was applied that allowed two-mentional monitoring of the vibration source. The CdTe:V crystals were excited by a He-Ne laser with λ=1.15 μm (&barh;ω=1.08 eV) and P=2 mW. The mechanism of appearance of the holographic current in the CdTe:V crystals (adaptive IR-photodetectors) taking into account of real defect structure was proposed. The frequency dependence of ac photo-EMF (holographic) current for the CdTe:V crystal was measured. It was shown that a low cutoff frequency for the laser intensity I=0.2 mW/mm2 equals 6.0 kHz that corresponds to the response time of 26 μsec.

Paper Details

Date Published: 11 September 2006
PDF: 10 pages
Proc. SPIE 6294, Infrared and Photoelectronic Imagers and Detector Devices II, 62940U (11 September 2006); doi: 10.1117/12.678751
Show Author Affiliations
Yu. P. Gnatenko, Institute of Physics (Ukraine)
M. S. Brodyn, Institute of Physics (Ukraine)
I. O. Faryna, Institute of Physics (Ukraine)
P. M. Bukivskij, Institute of Physics (Ukraine)
O. A. Shigiltchoff, Institute of Physics (Ukraine)
M. S. Furyer, Institute of Physics (Ukraine)
R. V. Gamernyk, Lviv National Univ. (Ukraine)
N. Kukhtarev, Alabama A&M Univ. (United States)
T. Kukhtareva, Alabama A&M Univ. (United States)

Published in SPIE Proceedings Vol. 6294:
Infrared and Photoelectronic Imagers and Detector Devices II
Randolph E. Longshore; Ashok Sood, Editor(s)

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