Febry-Perot 간섭계를 이용한 강유전 P(VDF-TrFE) 폴리머 열광학 특성평가

송현철; 김진상; 윤석진; 정대용; Hyun-Cheol Song; Jin-Sang Kim; Seok-Jin Yoon; Dae-Yong Jeong

Korean Journal of Materials Research, Vol.19, No.4, 228-231, April, 2009

DOI10.3740/MRSK.2009.19.4.228 Export Citation

Febry-Perot 간섭계를 이용한 강유전 P(VDF-TrFE) 폴리머 열광학 특성평가

Characterization of Thermo-optical Properties of Ferroelectric P(VDF-TrFE) Copolymer Using Febry-Perot Interferometer

송현철, 김진상, 윤석진, 정대용^{1, †}

한국과학기술연구원 박막재료연구센터
¹명지대학교 신소재공학과

Hyun-Cheol Song, Jin-Sang Kim, Seok-Jin Yoon, and Dae-Yong Jeong^{1, †}

Thin Film Materials Research Center, Korea Institute of Science & Technology, Cheongryang, Seoul 130-650, Korea
¹Department of Materials Science and Engineering, Myongji University, Yongin, Gyeonggi-do 449-728, Korea

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Phase transition in ferroelectric polymer is very interesting behavior and has been widely studied for real device applications, such as actuators and sensors. Through the phase transition, there is structural change resulting in the change of electrical and optical properties. In this study, we fabricated the Febry-Perot interferometer with the thin film of ferroelectric P(VDF-TrFE) 50/50 mol% copolymer, and thermo-optical properties were investigated. The effective thermo-optical coefficient of P(VDF-TrFE) was obtained as 2.3~3.8×10-4/K in the ferroelectric temperature region (45oC~65oC) and 6.0×10-4/K in the phase transition temperature region (65oC~85oC), which is a larger than optical silica-fiber and PMMA. The resonance transmission peak of P(VDF-TrFE) with the variation of temperature showed hysteretic variation and the phase transition temperature of the polymer in heating condition was higher than in the cooling condition. The elimination of the hysteretic phase transition of P(VDF-TrFE) is necessary for practical applications of optical devices.

Keywords:piezoelectric;Febry-Perot interferometer;P(VDF-TrFE) copolymer;thermo-optical coefficient

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