Broadband asymmetric quantum-well infrared photodetector in Long-Wavelength Infrared Range (LWIR)

Hostut M., ERGÜN Y., Sokmen I.

Joint 32nd International Conference on Infrared and Millimetre Waves, and 15th International Conference on Terahertz Electronics, IRMMW-THz2007, Cardiff, England, 3 - 07 September 2007, pp.134-136 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/icimw.2007.4516427
  • City: Cardiff
  • Country: England
  • Page Numbers: pp.134-136
  • Keywords: Infrared detectors, Intersub-band, Photodetectors, Quantum wells, QWIP
  • Anadolu University Affiliated: Yes


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 μm, 9.5 μm and 10.8 μm 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.