Nano-Metal Film Thermal Conductivity Measurement by using the Femtosecond Laser Pump and Probe Method
ZHU Li-Dan1,2, SUN Fang-Yuan1,2, ZHU Jie1**, TANG Da-Wei1**, LI Yu-Hua1,2, GUO Chao-Hong1
1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190 2Graduate University of Chinese Academy of Sciences, Beijing 100039
Nano-Metal Film Thermal Conductivity Measurement by using the Femtosecond Laser Pump and Probe Method
ZHU Li-Dan1,2, SUN Fang-Yuan1,2, ZHU Jie1**, TANG Da-Wei1**, LI Yu-Hua1,2, GUO Chao-Hong1
1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190 2Graduate University of Chinese Academy of Sciences, Beijing 100039
Abstract：Heat management at nanoscale is a critical issue across many areas of science and engineering, where the size effect of thermal properties plays an important role. We measure the transient thermoreflectance signals of thin metal films with thicknesses from 50 to 200 nm by using the femtosecond laser pump and probe method, and the experimental data are combined with the parabolic two-step model to enable us to measure thermal conductivity of the thin metal films. The measurement results of Ni and Al films show that, in the thickness range from tens to hundreds of nanometer, the thermal conductivity increases with the increasing thicknesses of the films, which agrees well with the previous conclusions.
ZHU Li-Dan, SUN Fang-Yuan, ZHU Jie, TANG Da-Wei, LI Yu-Hua, GUO Chao-Hong. Nano-Metal Film Thermal Conductivity Measurement by using the Femtosecond Laser Pump and Probe Method[J]. 中国物理快报, 2012, 29(6): 66301-066301.
ZHU Li-Dan, SUN Fang-Yuan, ZHU Jie, TANG Da-Wei, LI Yu-Hua, GUO Chao-Hong. Nano-Metal Film Thermal Conductivity Measurement by using the Femtosecond Laser Pump and Probe Method. Chin. Phys. Lett., 2012, 29(6): 66301-066301.
2012, Vol. 29 
