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Proceedings Paper

Evaporative Thin Metal Films As Polarizers
Author(s): Robert E. Slocum
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Paper Abstract

Thin metal films have been fabricated by vacuum evaporation, which polarize transmitted light at near-infrared and visible wavelengths. Polarization of normal-incidence light was observed for silver, gold and copper films made by this technique. The polarizing films were produced by directing a beam of metal atoms onto the smooth surface of an optically transparent substrate at a large angle of incidence. The film structure revealed by electron-microscope examination is a dense array of parallel metal whiskers aligned opposite the direction of the incident metal atom beam. Polarization is produced by the hertzian parallel-wire effect, which is also the polarization principle of the conventional wire-grid polarizer. The resulting polarizer material can be produced in sheet form or applied as a coating to optical elements.

Paper Details

Date Published: 17 May 1982
PDF: 7 pages
Proc. SPIE 0307, Polarizers and Applications, (17 May 1982); doi: 10.1117/12.965901
Show Author Affiliations
Robert E. Slocum, Texas Instruments Incorporated (United States)

Published in SPIE Proceedings Vol. 0307:
Polarizers and Applications
Giorgio B. Trapani, Editor(s)

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