Decay time of laser-induced thermoelectric voltage signals

XIONG Fei; ZHANG Hui; YANG YOU-li; ZHANG Peng-xiang

LASER TECHNOLOGY > 2009 > 33(3): 307-309,332.

XIONG Fei, ZHANG Hui, YANG YOU-li, ZHANG Peng-xiang. Decay time of laser-induced thermoelectric voltage signals[J]. LASER TECHNOLOGY, 2009, 33(3): 307-309,332.

Citation:

XIONG Fei, ZHANG Hui, YANG YOU-li, ZHANG Peng-xiang. Decay time of laser-induced thermoelectric voltage signals[J]. LASER TECHNOLOGY, 2009, 33(3): 307-309,332.

Citation:

XIONG Fei, ZHANG Hui, YANG YOU-li, ZHANG Peng-xiang. Decay time of laser-induced thermoelectric voltage signals[J]. LASER TECHNOLOGY, 2009, 33(3): 307-309,332.

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Decay time of laser-induced thermoelectric voltage signals

1.
Institute of Advanced Materials for Photo-electronics, Kunming University of Science and Technology, Kunming 650051, Chian;
2.
School of Materials Science and Engineering, Chongqing Institute of Technology, Chongqing 400050, China

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Received Date: March 24, 2008
Revised Date: July 21, 2008
Published Date: June 24, 2009

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Abstract

Abstract

In order to get the quantitative relationship between the decay time constant(DTC)of the laser-induced thermoelectric voltage(LITV)signals and the physical parameters of the thin films,YBa2Cu3O7-x,La0.67Ca0.33 MnO3, La0.67Ca0.33 MnO3 thin films were prepared by means of pulsed laser deposition.The corresponding LITV signals were detected with these films illuminated by 248nm pulsed laser.An exact function of DTC was deduced based on the interaction between the laser pulses and the films.The measured LITV signals were observed decaying exponentially,which is in agreement with the model of LITV effect.The DTC is just limited by the thermal transition properties of the films,and is the function of the thermal diffusion constant.According to the measured decay time,the thermal diffusion constants of the thin films can be calculated.Thus the measurement of DTC of LITV signals is a new way to investigate the thermal diffusion constant of thin films.
- films,
- response time,
- laser-induced themnoelectric voltage,
- thermal diffusion constant

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References

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