Title :
Broadband asymmetric quantum-well infrared photodetector in long-wavelength infrared range (LWIR)
Author :
Hostut, M. ; Ergun, Y. ; Sokmen, I.
Author_Institution :
Anadolu Univ. at Eskisehir, Eskisehir
Abstract :
A theoretical investigation of a GaAs-AlGaAs infrared detector consisting of three asymmetric quantum wells is presented. Each quantum well is sensitive to yield absorption and a photoresponse at peak wavelengths of 8 mum, 9.5 mum and 10.8 mum respectively. Device operation is based on inter-subband bound-to-bound transition. Asymmetry in the quantum wells is shown to give broad band responsivity spectrum at an operating bias.
Keywords :
aluminium compounds; gallium arsenide; infrared detectors; photodetectors; semiconductor quantum wells; GaAs-AlGaAs; broadband asymmetric quantum-well infrared photodetector; intersubband bound-to-bound transition; long-wavelength infrared range; photoresponse; wavelength 10.8 mum; wavelength 8 mum; wavelength 9.5 mum; yield absorption; Dark current; Doping; Electromagnetic wave absorption; Electrons; Gallium arsenide; Infrared detectors; Photodetectors; Quantum well devices; Quantum wells; Wave functions; Infrared detectors; QWIP; intersubband; photodetectors; quantum wells;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516427
