FAR-INFRARED SPECTRA OF CRYSTALS AND SOLIDS IN A LARGE RANGE OF TEMPERATURES.

Abstract

Development was undertaken of Far-Infrared techniques at liquid helium temperatures to get absorption and reflection spectra from which are deduced the optical constants of the solids. They appear fruitfull and disclose: (1) the supertransmission of crystals at low temperature in the far-infrared; (2) the different behaviour of crystals and glasses; (3) far infrared electronic transitions in several materials; (4) a drastic change of damping and anharmonicity with temperature. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 31, 1966
Accession Number
AD0636614

Entities

People

  • A. Hadni
  • J. Lecomte

Organizations

  • National Center for Scientific Research

Tags

DTIC Thesaurus Topics

  • Absorption
  • Cooperation
  • Diffraction
  • Electromagnetic Spectra
  • Infrared Spectra
  • Low Temperature
  • Materials
  • Reflection
  • Spectra
  • Transitions
  • Ultraviolet Spectra
  • Wave Phenomena

Readers

  • Materials Science and Engineering.
  • Spectroscopy.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene