Broadband asymmetric quantum-well infrared photodetector in long-wavelength infrared range (LWIR)

Hostut M., Ergun Y., Sokmen I.

Joint 32nd International Conference on Infrared and Millimeter Waves/15th International Conference on Terahertz Electronics, Cardiff, United Kingdom, 3 - 09 September 2007, pp.130-131 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • City: Cardiff
  • Country: United Kingdom
  • Page Numbers: pp.130-131


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 pro, 9.5 mu m and 10.8 mu m respectively. Device operation is based on inter-subband bound-to-bound transition. Asymmetry in the quantum welts is shown to give broad band responsivity spectrum at an operating bias.