Accession Number:

ADA172691

Title:

Study of Transient Phonon Dynamics.

Descriptive Note:

Final rept. 1 Jul 83-30 Jun 86,

Corporate Author:

INDIANA UNIV AT BLOOMINGTON DEPT OF PHYSICS

Personal Author(s):

• Bron,W. E.

Report Date:

1986-08-30

Pagination or Media Count:

16.0

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 authors 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.

Descriptors:

• *LASER PUMPING
• *ELECTRONIC STATES
• *PHONONS
• EXCITATION
• SEMICONDUCTORS
• TRANSPORT PROPERTIES
• LIGHT PULSES
• SHORT PULSES
• IONIC CRYSTALS

Subject Categories:

• Electricity and Magnetism
• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE