Title :
Responsivity and lifetime of resonant cavity enhanced HgCdTe detectors
Author :
Wehner, Justin G A ; Musca, Charles A. ; Sewell, Richard H. ; Dell, J.M. ; Faraone, L.
Author_Institution :
Sch. of Electr., Electron. & Comput. Eng., Western Australia Univ., Crawley, WA
Abstract :
Resonant cavity enhanced HgCdTe structures have been grown by molecular beam epitaxy, and photoconductors have been modelled and fabricated based on these structures. Responsivity has been measured and shows a peak responsivity of 8 times 104 V/W for a 50 times 50 mum2 photoconductor at a temperature of 200K. The measured responsivity shows good agreement with the modelled responsivity across the mid-wave infrared window (3-5 mum). The measured responsivity is limited by surface recombination, which limits the effective lifetime to ap 15ns. The optical cut-off of the detector varies with temperature as modelled. There is strong agreement between modelled peak responsivity and measured peak responsivity with varying temperature from 80-300K
Keywords :
cadmium compounds; cavity resonators; chalcogenide glasses; infrared detectors; mercury compounds; molecular beam epitaxial growth; photoconducting materials; surface recombination; 3 to 5 micron; 80 to 300 K; HgCdTe; mid-wave infrared window; molecular beam epitaxy; peak responsivity; photoconductors; resonant cavity enhanced detectors; surface recombination; Bandwidth; Extraterrestrial measurements; Infrared detectors; Mirrors; Molecular beam epitaxial growth; Optical imaging; Photoconductivity; Resonance; Semiconductor process modeling; Temperature;
Conference_Titel :
Aerospace Conference, 2006 IEEE
Conference_Location :
Big Sky, MT
Print_ISBN :
0-7803-9545-X
DOI :
10.1109/AERO.2006.1655909