Fabrication and Patterning of Submierometer-Thick Optical Polarizing Films for 800 nm Using Stretched Silver Island Multilayers |
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Authors: | Kazutaka Baba Yoshinori Sato Tsutomu Yoshitake Mitsunobu Miyagi |
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Institution: | (1) Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University, Aramaki-aza-Aoba 05, Aoba-ku, Sendai 980-8579, Japan |
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Abstract: | Stretched silver island multilayers have been investigated for patterned optical polarizers for the wavelength of 800 nm. Submicrometer-thick optical polarizing films are fabricated by stretching periodic multilayers consisting of silver island layers and Pyrex layers at the temperature of 660°C. As the optical anisotropy of the optical polarizing film is lost by heating at a temperature higher than the stretching temperature, the fine non-polarizing areas can be deliberately and easily formed on the optical polarizing film by laser irradiation with high power density. We have successfully formed various non-polarizing areas on the optical polarizing film with a 1 W-class carbon dioxide laser. The demonstrated fabricating techniques of deliberately patterned optical polarizing films should be useful for novel optical computing and sensing devices. |
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Keywords: | optical polarizer optical anisotropy nanocluster metal island film thin film multilayer laser wriing |
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