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 language | English |
|---|---|
| Pages (from-to) | 401-404 |
| Number of pages | 4 |
| Journal | Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves |
| Volume | 23 |
| Issue number | 6 |
| State | Published - Dec 2004 |
| Externally published | Yes |
Keywords
- Diffracting grating
- Finite difference time domain (FDTD)
- Quantum well infrared photodetector (QWIP)