Free-Carrier Grating Diffraction from Quantum Well Fabry-Perots

Abstract

This effort investigated the possibility of replacing the electroabsorption quantum wells with the strong absorption bleaching nonlinearities of high peak-power pulses. Free carrier absorption bleaching was investigated in GaAs epilayers and AlGaAs/GaAs multiple quantum wells for excitation from above bandgap 10 ns pulses. Grating diffraction was also measured. The presence of thermal gratings, due to heating from the high-intensity pump pulse, contributed significantly to the observed diffraction. The lower than expected observed diffraction efficiency was attributed to a reduction in the internal writing efficiency due to the comparable sizes of the diffusion lengths and the grating space.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1998
Accession Number
ADA347283

Entities

People

  • David. D. Nolte
  • M. R. Melloch

Organizations

  • Purdue Research Foundation

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Air Force Research Laboratories
  • Band Gaps
  • Detection
  • Diffusion
  • Electro-Optic Modulators
  • Energy Bands
  • Intensity
  • Laser Beams
  • Materials
  • Modulation
  • Modulators
  • Quantum Wells
  • Semiconductor Lasers
  • Semiconductors
  • Solid State Physics
  • Wave Mixing

Fields of Study

  • Materials science

Readers

  • Optical Physics and Photonics.
  • Semiconductor Device Technology

Technology Areas

  • Quantum Computing
  • Space