The time evolution of the pyroelectric response induced by a laser pulse irradiation in a VDF/TrFE copolymer

Author

Takahashi, Yoshiyuki ; Hiraoka, Kojiro ; Furukawa, Takeo

Author_Institution

Fac. of Sci., Sci. Univ. of Tokyo, Japan

fYear

1996

fDate

25-30 Sep 1996

Firstpage

964

Lastpage

967

Abstract

The pyroelectric response induced by a YAG laser pulse irradiation has been measured over a bread range of 1ns-10s for a VDF/TrFE copolymer with composition 75/25 mol%. The time spectra contain two damped oscillations associated with thickness and length extension mode piezoelectric resonance. Removing such components by means of Fourier analysis has revealed two kinds of pyroelectric responses, the instantaneous component appearing prior to thermal expansion and the gradually increasing component reflecting fluctuations of crystalline dipoles

Keywords

laser beam effects; polymer blends; polymer films; pyroelectricity; 1 ns to 10 s; Fourier analysis; VDF/TrFE copolymer; YAG laser pulse irradiation; crystalline dipole fluctuations; damped oscillations; piezoelectric resonance; pyroelectric response; thermal expansion; time spectrum; Charge measurement; Current measurement; Ferroelectric materials; Laser theory; Optical pulses; Pulse measurements; Pyroelectricity; Resistors; Resonance; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1996. (ISE 9), 9th International Symposium on

Conference_Location

Shanghai

Print_ISBN

0-7803-2695-4

Type

conf

DOI

10.1109/ISE.1996.578241

Filename

578241