Electronic Properties of GaAs-(Al,Ga)As Quasiperiodic Heterostructures

Abstract

We have studied random, Fibonacci and Thue-Morse Gallium Arsenide- based superlattices using Raman scattering and other optical techniques. The non-resonant Raman data provides information on Fourier components of the modulation while resonant results reveal dips associated with gaps in the phonon spectrum. The latter have been explained in terms of a model showing that phonons with wavevector close to the zone edge and zone centers avoid the surface. Keywords: Heterostructures, Quasiperiodic structures, Optical properties, Acoustic phonons.

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Document Details

Document Type
Technical Report
Publication Date
Oct 27, 1989
Accession Number
ADA214704

Entities

People

  • K. Bajema
  • Roberto Merlin

Organizations

  • University of Michigan

Tags

DTIC Thesaurus Topics

  • Crystal Lattice Vibrations
  • Diffraction
  • Electronic States
  • Experimental Data
  • Military Research
  • Optical Absorption
  • Optical Properties
  • Phonons
  • Raman Scattering
  • Raman Spectra
  • Scattering
  • Spectra
  • Spectroscopy
  • Superlattices
  • Waves
  • X Ray Scattering

Readers

  • Computational Linguistics
  • Plasma Physics / Magnetohydrodynamics
  • Semiconductor Device Technology

Technology Areas

  • Microelectronics