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Finite difference time domain modeling of grating-coupled quantum well infrared photodetector

  • Xiao Zhou Shu*
  • , Yan Rui Wu
  • , Xiao Shuang Chen
  • , Jun Hao Chu
  • *Corresponding author for this work
  • CAS - Shanghai Institute of Technical Physics

Research output: Contribution to journalArticlepeer-review

Abstract

Diffraction grating is indispensable for quantum well infrared photodetectors (QWIP) in order to improve optical coupling because of the limitation of quantum selection rules. A numerical approach based on finite difference time domain (FDTD) method was presented for investigating the diffraction effect of a metal grating fabricated in QWIP. Simulation results demonstrate that such a complicated structure can be optimized by electromagnetic analysis based on the FDTD method. Detailed field distribution inside QWIP can be obtained for estimating the optical coupling efficiency of the grating.

Original languageEnglish
Pages (from-to)401-404
Number of pages4
JournalHongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves
Volume23
Issue number6
StatePublished - Dec 2004
Externally publishedYes

Keywords

  • Diffracting grating
  • Finite difference time domain (FDTD)
  • Quantum well infrared photodetector (QWIP)

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