Dynamics of Excitons in Quantum Wells,

Abstract

We measure the time dependence of the excitonic photoluminescence (PL) in quantum wells (QWs) with well width Lz ranging from 25A to 50A. The samples are AI0.2Ga0.8As/GaAs multiple QWs with 30 periods with decoupled wells and were grown by molecular beam epitaxy (MBE). QWs grown with and without growth interruption at the interfaces are investigated. The excitation is provided by 5 psec pulses from a synchronously pumped tunable dye laser. The PL spectrum is detected by an imaging (i.e. multichannel) photomultiplier with a spectral resolution of 0.5 meV and time resolution (FWHM) of 120 psec.

Document Details

Document Type
Technical Report
Publication Date
May 22, 1992
Accession Number
ADP007866

Entities

People

  • J. A. Kash
  • M. Zachau
  • W. T. Masselink

Organizations

  • IBM Thomas J. Watson Research Center

Tags

DTIC Thesaurus Topics

  • Dye Lasers
  • Dynamics
  • Epitaxial Growth
  • Excitation
  • Lasers
  • Liquid Dye Lasers
  • Liquid Lasers
  • Molecular Beam Epitaxy
  • Molecular Beams
  • Multichannel
  • Optoelectronics
  • Photoluminescence
  • Quantum Wells
  • Spectra
  • Time Dependence

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Optical Physics and Photonics.
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Microelectronics
  • Quantum Computing