Accession Number:

ADA459969

Title:

Performance Improvement in Quantum Well Lasers by Optimizing Band Gap Offset at Quantum Well Heterojunctions

Descriptive Note:

Journal article

Corporate Author:

CALIFORNIA INST OF TECH PASADENA T J WATSON LABS OF APPLIED PHYSICS

Report Date:

1993-07-26

Pagination or Media Count:

4.0

Abstract:

We analyze the influence of the band gap offset at the quantum well QW heterojunctions on the performance of QW lasers. It is shown that, in addition to the strain, optimization of the band gap offset also leads to improved performance in QW lasers, especially in enabling a simultaneous attainment of ultralow threshold current and high speed. The improvement stems from the reduction of state filling in the QW lasers since the asymmetry between the conduction band and the valence band structures in the optical confining region is compensated by the corresponding optimal band gap offset at the QW heterojunctions. The results provide general guidelines to the design of high performance of QW lasers as well as suggest applications to other active laser devices.

Subject Categories:

  • Lasers and Masers
  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE