Accession Number:

ADA459998

Title:

Quantum Interference Effect and Electric Field Domain Formation in Quantum Well Infrared Photodetectors

Descriptive Note:

Journal article

Corporate Author:

CALIFORNIA INST OF TECH PASADENA DEPT OF APPLIED PHYSICS

Report Date:

1995-06-01

Pagination or Media Count:

4.0

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.

Subject Categories:

  • Infrared Detection and Detectors
  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE