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Submillimeter Optical Properties of Hexagonal Boron Nitride

Published online by Cambridge University Press:  25 February 2011

A. J. Gatesman ,
R. H. Giles  and
J. Waldman
A. J. Gatesman
Affiliation:
Department of Physics and Applied Physics, University of Massachusetts · Lowell Lowell, MA 01854
R. H. Giles
Affiliation:
Department of Physics and Applied Physics, University of Massachusetts · Lowell Lowell, MA 01854
J. Waldman
Affiliation:
Department of Physics and Applied Physics, University of Massachusetts · Lowell Lowell, MA 01854
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Abstract

The submillimeter optical properties of hot-pressed boron nitride with a hexagonal crystal structure were studied at room temperature from approximately 20 cm-1 to 120 cm-1 (500μm -84 μm) with a Fourier Transform Spectrometer. Several grades were studied and probed both parallel and perpendicular to the material's optic axis. The material was found to behave as a negatively uniaxial birefringent crystal. In one case, the birefringence (Δ = ne - no) was quite large with a value of-0.152. The material's absorption properties were also studied. For certain grades, a modest dichroism was observed. The low absorption (α < 1 cm-1) for grade A at frequencies below 38 cm-1 suggests the possibility for millimeter/submillimeter wave applications. Results are compared with data by other researchers on related materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 242: Symposium G – Wide Band-Gap Semiconductors , 1992 , 623
Copyright
Copyright © Materials Research Society 1992

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References

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