Synthesis and Characterization of Infrared Transmitting Materials
Abstract
The objective of this program was to extend basic knowledge of the structure and properties of significant new infrared materials. Two materials were synthesized and studied: Gallium phosphide, which is of potential importance as a high durability multispectral window surfacing material and zinc selenide, the current state-of-the-art material for high quality long wavelength infrared and laser components. A new microcrystalline form of gallium phosphide was synthesized by chemical vapor deposition. It exhibited high infrared transparency and no crystals of gallium phosphide and gave new detailed information on the 3 and 4 phonon spectra at wavelengths below 12 micron. Similar spectroscopy on the infrared absorption edge of ZnSe better defined its 3 and 4 phonon spectral features and separated them from instrumental effects. A low temperature form of ZnSe synthesized by the CVD process showed impurity spectral features at wavelengths below 13 micron. They were attributed to the presence of ZnH2, H2Se and H2S complexes. Broadband internal reflection spectroscopy was carried out on ZnSe samples subjected to various organic cleansing procedures. Spectral absorption at wavelengths below 13 micron were attributed to CH2 and H2O - other features were not identifiable.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1980
- Accession Number
- ADA096963
Entities
People
- J. Pappis
- Perry A. Miles
- R. W. Tustison
Organizations
- RTX