STUDY OF OPTICAL INTERACTIONS IN SOLIDS
Abstract
Multiphoton absorption in semiconductors was investigated with emphasis on the III-V compounds. It was shown that this mechanism can set an intrinsic upper limit to the power density transmittible through semiconductors. Laser action in a large volume of GaAs was excited by double-photon pumping using a Q-switched neodymium laser, yielding output power of the order of a megawatt/sq cm at 8365A at liquid nitrogen temperature. A new temperature anomaly of the threshold for stimulated Raman emission in liquid benzene was discovered and investigated. The first observation of infrared stimulated emission associated with optical phonons of a liquid was reported. This was seen at 5 micrometers from benzene. In addition, induced transparency by coherent optical phonons was observed. A new technique of frequency-modulated spectroscopy was developed which enables one to readily obtain the first or higher derivatives of any optical spectra.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 28, 1968
- Accession Number
- AD0691499
Entities
People
- J. P. Biscar
- M. Welkowsky
- R. Braunstein
- S. Gratch
Organizations
- University of California, Los Angeles