Measurement of Pockels Effect in Piezoelectric Chiral Polymer Film

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概要

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• The possibility has been indicated that a piezoelectric polymer with helical chirality (chiral polymer) such as poly-L-lactic acid (PLLA) shows a large linear electrooptical constant (Pockels effect). However, the linear electrooptical constant of a PLLA film may be very small because such a film fabricated by the conventional method has a complex high-order structure with intermingled crystalline and amorphous regions. In order to measure the small linear electrooptical constant of a PLLA film, we developed a new measurement system, which is based on the heterodyne interferometry principle. In this system, the accuracy of retardation is 0.08 nm and the measurement time is 0.1 s. In our attempt to realize a PLLA film with a large linear electrooptical constant, we fabricated a PLLA film, which was heated to 120°C under 320 MPa. Finally, using our new measurement system, we obtained a linear electrooptical constant of 0.070 pm/V in the PLLA film, which is very small compared with those of other famous Pockels materials. However, the linear electrooptical constant of the PLLA film is clarified in this study for the first time.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2005-09-15

著者

• Umeda Norihiro

  Tokyo Univ. Agriculture And Technol. Tokyo Jpn

• Kowa Hiroyuki

  Uniopt Co. Ltd.

• Tajitsu Yoshiro

  Graduate School of Electrical Engineering, Kansai University, Suita, Osaka 564-8680, Japan

• Tsukiji Mitsuo

  Graduate School of Engineering, Kansai University, 3-3-35 Yamate, Suita, Osaka 564-8680, Japan

• Muraki Kanae

  Uniopt Co., Ltd., 2102 Makigaya, Aoi-ku, Shizuoka 421-1221, Japan

• Umeda Norihiro

  Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan

• Kowa Hiroyuki

  Uniopt Co., Ltd., Seiko Bldg., 250-3 Tegosihara, Shizuoka 421-0131 Japan

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