Optical Phonon Modes in a Double Heterostructure of Polar Crystals

Abstract

The equation of motion for the polarization vector for a double heterostructure of polar crystals is solved exactly within the framework of the continuum model. There exist only two types of phonon modes, the interface modes and the confined bulk modes, whose eigenvectors are obtained explicity. Dispersion relations are derived analytically for the interface modes, while the confined bulk modes are dispersionless, a fact consistent with the model. It is also found that in Raman scattering experiments, the symmetric interface modes are predominantly longitudinal (LO) and the antisymmetric interface modes transversal (TO). In the central region of the Brillouin zone, however, they both split into two branches oscillating at LO and TO frequencies, respectively. Possibly reinterpretation of various experiments are briefly discussed. (JHD)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1989
Accession Number
ADA214208

Entities

People

  • Duoliang Lin
  • R Chen
  • Thomas F. George

Organizations

  • University at Buffalo

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Chemical Engineering
  • Crystal Lattice Vibrations
  • Differential Equations
  • Dispersion Relations
  • Frequency
  • Integral Equations
  • Materials
  • Materials Science
  • Military Research
  • New York
  • Quantum Wells
  • Raman Scattering
  • Semiconductors
  • Solid State Physics
  • Two Dimensional
  • United States

Fields of Study

  • Physics

Readers

  • Linear Algebra
  • Plasma Physics / Magnetohydrodynamics
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.