Evaporative Thin Metal Films As Polarizers

Robert E. Slocum

doi:10.1117/12.965901

17 May 1982 Evaporative Thin Metal Films As Polarizers

Robert E. Slocum

Proceedings Volume 0307, Polarizers and Applications; (1982) https://doi.org/10.1117/12.965901
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

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.

Citation Download Citation

Robert E. Slocum "Evaporative Thin Metal Films As Polarizers", Proc. SPIE 0307, Polarizers and Applications, (17 May 1982); https://doi.org/10.1117/12.965901

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