Quantum Interference Effect and Electric Field Domain Formation in Quantum Well Infrared Photodetectors
Abstract
An observation of quantum interference effect in photocurrent spectra of a weakly coupled bound-to-continuum multiple quantum well photodetector is reported. This effect persists even at high biases where the Kronig Penney minibands of periodic superlattice potential in the continuum are destroyed. Our results show that electrons remain coherent over a distance of 40 50 nm. The observation was used to investigate electric field domain formation induced by sequential resonant tunneling in the superlattice. A large off-resonant energy level alignment between two neighboring wells in the high field domain was observed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1995
- Accession Number
- ADA459998
Entities
People
- Ali Shakouri
- Amnon Yariv
- Yuanjian Xu
Organizations
- California Institute of Technology