Accession Number : ADA330085

Title :   Hexagonal II-VI Structures by Substrate Bandgap Engineering

Corporate Author : OPTICAL SEMICONDUCTORS INC PEEKSKILL NY

Personal Author(s) : Fitzpatrick, Brian J. ; Tamargo, Maria C.

PDF Url : ADA330085

Report Date : 08 OCT 1997

Pagination or Media Count : 4

Abstract : A synthesis procedure was developed for bulk ZnMgSSe, using metallic Mg and Se. This is done in the growth crucible in the growth system; this reduces contamination from exposure to the laboratory ambient. A growth run with 12% Mg and 8% S (nominal) concentrations was done using our zone melting technique in a non-seeding crucible. A 45 deg cross-section was made by cleaving; it appeared that one grain was about half of the 26 mm (average) diameter boule. No twins were visible at all. It is, of course, desirable to have twin-free material, but, even more importantly, the lack of twins is a strong indication of hexagonal material, a major goal of the program.

Descriptors :   *MAGNESIUM, *STRUCTURES, *SUBSTRATES, *SEMICONDUCTORS, *GROUP II-VI COMPOUNDS, *ZINC COMPOUNDS, METALS, OPTICS, EXPOSURE(GENERAL), SYNTHESIS, COMPOSITE MATERIALS, SULFUR, CONTAMINATION, SOLID STATE PHYSICS, CRYSTALLOGRAPHY, TWINNING(CRYSTALLOGRAPHY), SELENIUM, CRUCIBLES, ZONE MELTING, MOLECULAR BEAM EPITAXY.

Subject Categories : Inorganic Chemistry
      Electrical and Electronic Equipment
      Laminates and Composite Materials
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE