Normal incidence detection of ultraviolet, visible, and mid-infrared radiation in a single GaAs/AlGaAs device.
A GaAs/AlGaAs detector is demonstrated showing multiple detection capabilities. This detector exhibits a broad spectral response in the 200-870 nm (ultraviolet-visible) range for forward bias and in the 590-870 nm (visible) range for reverse bias. In the mid-IR region, two peaks at 5 and 8.9 microm can be observed for low and high forward bias voltages, respectively. In addition, the peak at 8.9 microm is sensitive to the polarization of the incoming radiation.
Ariyawansa
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G
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA.
Jayaweera
P V V
PV
Perera
A G U
AG
Matsik
S G
SG
Buchanan
M
M
Wasilewski
Z R
ZR
Liu
H C
HC