Study of Transient Phonon Dynamics.

Abstract

The research program during the past three year grant period has been quite successful in devising new, and adapting existing, laser based techniques to the study of short and ultra-short duration laser induced transient dynamics. For the most part, work has concentrated on the dynamics of excited, nonequilibrium phonon distributions in semiconductors and in ionic solids. The excitation brings the solids well away from thermal equilibrium. It has been the author's contention that phonon dynamics and phonon transport can be investigated in greater detail by nonequilibrium techniques than by thermal equilibrium techniques as, e.g., thermal conductivity measurements. The results obtained so far offer an excellent opportunity for the expansion of existing methods and facilities to new areas of research. Keywords: Transient Phonon Dynamics; Lasers; Ionic Solids; Phonon Dynamics; and Phonon Transport.

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Document Details

Document Type
Technical Report
Publication Date
Aug 30, 1986
Accession Number
ADA172691

Entities

People

  • W. E. Bron

Organizations

  • Indiana University Bloomington

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Crystal Lattice Vibrations
  • Detection
  • Dynamics
  • Excitation
  • Frequency
  • Laser Beams
  • Laser Pulses
  • Lasers
  • Measurement
  • Phonons
  • Physics
  • Picosecond Time
  • Repetition Rate
  • Scattering
  • Students
  • Subatomic Particles
  • Thermal Conductivity

Readers

  • Materials Science and Engineering.
  • Pulsed Power and Plasma Physics.
  • Systems Analysis and Design

Technology Areas

  • Directed Energy
  • Microelectronics