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Proceedings Paper

Window materials for 280 GHz continuous wave gyrotron
Author(s): Mohammed Nurul Afsar
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Paper Abstract

The high frequency absorption in crystalline and polycrystalline materials arises mainly from sharp lattice vibrations, or due to the tail effect of the intense lattice vibration absorption peak. In polycrystalline material there are also other sources of absorption such as amorphous region continuum. A monatomic material such as diamond or diamond like silicon has a simple cubic structure and the lattice vibration absorption peak appears at a very high frequency (Infrared frequency region 20,000 - 40,000 GHz). The 280 GHz region is then completely free from the tail effect of lattice vibration absorption peak. If one can prepare a specimen of such a material in which other millimeter wave absorption processes are compensated, the window will have negligible absorption at 280 GHz.

Paper Details

Date Published: 18 November 1989
Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); doi: 10.1117/12.978770
Show Author Affiliations
Mohammed Nurul Afsar, Tufts Univ. (United States)

Published in SPIE Proceedings Vol. 1039:
13th Intl Conf on Infrared and Millimeter Waves
Richard J. Temkin, Editor(s)

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