Electrooptical Quantum Wells

Abstract

A detailed study of electro refraction and electro absorption in a new semiconductor quantum well system known as an asymmetric coupled quantum well is presented in this report. Resonant coupling of electron levels in a closely-spaced pair of quantum well is shown to modify the exciton absorption spectrum and, through the Kramers-Kronig relation, lead to substantial changes in the index of refraction of single mode waveguides at wavelengths much longer than the absorption edge of the guide. Intensity and phase modulators have been fabricated and tested using GaAs/A1GaAs quantum wells (for operation at 0.86-0. 95 micron) and InGaAs/IOnA1aS wells lattice-matched to InP substrates for use at 1.55 micron. (r.r.h.)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1989
Accession Number
ADA226102

Entities

People

  • John W. Little
  • K. J. Ritter
  • Richard P. Leavitt

Organizations

  • Martin Marietta

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption Spectra
  • Band Gaps
  • Diffraction
  • Energy Bands
  • Measurement
  • Modulators
  • Optical Properties
  • Optics
  • Phase Modulators
  • Quantum Wells
  • Refraction
  • Refractive Index
  • Semiconductor Devices
  • Semiconductors
  • Solid State Physics
  • Spectra
  • Spectroscopy

Fields of Study

  • Materials science

Readers

  • Optical Physics and Photonics.
  • Semiconductor Device Technology
  • Spectroscopy.

Technology Areas

  • Microelectronics
  • Quantum Computing
  • Space