Enhancement of photoelastic constant of optical thin film waveguide assisted by surface acoustic wave |
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Authors: | Nakagawa Yawata Kakio |
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Institution: | Faculty of Engineering, Yamanashi University, Kofu, Japan. nakagawa@es.yamanashi.ac.jp |
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Abstract: | In the present research, we proposed a method of controlling the photoelastic constant using surface acoustic waves, which had not previously been reported, and carried out experimental studies thereof. A Bragg diffraction was carried out to determine the photoelastic constants of Ta2O5. As a result, it is confirmed that the photoelastic constant of a Ta2O5 thin film undergoing a sputtering process, during which surface acoustic waves were excited on the substrate, was about 2.19-2.27 times larger than those of thin films on which surface acoustic waves were not excited. |
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