Abstract
Intermixing of the well and barrier layers in quantum well infrared photodetectors (QWIPs) can be used to realize a broadened spectral response as well as multiple color detectors. We describe the experimental results of bom rapid thermal annealing (RTA) and laser annealing (LA) QWIPs operating in the 8-12μm regime. The peak spectral response of the annealed detectors was shifted to longer wavelength as compared to the as-grown detectors. In general, a decrease in detector performance after annealing is also observed which may be attributable to a change in the absorption coefficient caused by the out-diffusion of dopants during annealing. Recent advances in growth technology, complimented by innovative structures should offset any degradation in performance. Thus, the post-growth control of the composition profiles by annealing offers opportunities to fine tune various aspects of a QWIP's response.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 138-142 |
| Number of pages | 5 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3211 |
| DOIs | |
| State | Published - 1998 |
| Event | International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96 - Madras, India Duration: Dec 9 1996 → Dec 9 1996 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering