Light-Hole and Heavy-Hole Transitions for High-Temperature Long-Wavelength Infrared Detection
Abstract
Hole transitions from the heavy-hole hh to the light-hole lh band contributing to the 4-10 microns response range are reported on p-GaAs/AlGaAs detectors. The detectors show a spectral response up to 16.5 microns, operating up to a temperature of 330 K where the lh-hh response is superimposed on the free-carrier response. Two characteristic peaks observed between 5-7 microns are in good agreement with corresponding energy separations of the lh and hh bands and thus originated from lh-hh transitions. Results will be useful for designing multi-spectral detection which could be realized on a single p-GaAs structure.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2010
- Accession Number
- ADA579956
Entities
People
- A. G. Perera
- H. C. Liu
- K K Choi
- M. Buchanan
- P. K. Pitigala
- P. Wijewarnasuriya
- Y. F. Lao
- Z. R. Wasilewski
Organizations
- Georgia State University