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n-GaAs thermo-voltage detector for short and powerful CO2 laser pulses

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5 Author(s)
Vounckx, R. ; Dept. of Electron., Vrije Univ., Brussels, Belgium ; Kotov, V. ; Shkerdin, G. ; Borghs, G.
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Conceiving detectors, which can monitor the spatial and temporal beam distribution of (sub)-ns and powerful (> 1 MWcm-2) CO2 laser pulses without optical attenuation and electrical amplification is a challenging issue. We present theoretical and experimental results of our novel detector based on optically induced electron temperature gradients in resonant plasmas in n-GaAs. We measured a responsivity up to 8 mV/MWcm-2 at optical power levels in the range from 1 to 100 MWcm-2 where other detectors strongly degrade or even fail.

Published in:

Optoelectronic and Microelectronic Materials and Devices, 2002 Conference on

Date of Conference:

11-13 Dec. 2002