TY - JOUR
T1 - Ultrafast thermalization dynamics in two-layer metal films excited by temporally shaped femtosecond laser
AU - Du, Guangqing
AU - Yang, Qing
AU - Chen, Feng
AU - Wu, Yanmin
AU - Ou, Yan
AU - Lu, Yu
AU - Hou, Xun
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - We theoretically investigated ultrafast thermalization dynamics in two-layer Au coated metal films excited by temporally shaped femtosecond laser. It is revealed that the thermalization processes at surface and interface of the two-layer metal films can be alternatively promoted via tailoring pulse separation and pulse energy ratio of temporally shaped double pulses. The results are explained as competitive electron-phonon coupling dynamics in the two-layer metal films, which can be well manipulated by temporally shaped femtosecond laser. This study provides basic understanding for optimizing laser thermal damage in layered metal films via tailoring femtosecond laser for a wide range of applications in the fields such as laser resonant cavity, photoelectric equipments, MEMS and biochips.
AB - We theoretically investigated ultrafast thermalization dynamics in two-layer Au coated metal films excited by temporally shaped femtosecond laser. It is revealed that the thermalization processes at surface and interface of the two-layer metal films can be alternatively promoted via tailoring pulse separation and pulse energy ratio of temporally shaped double pulses. The results are explained as competitive electron-phonon coupling dynamics in the two-layer metal films, which can be well manipulated by temporally shaped femtosecond laser. This study provides basic understanding for optimizing laser thermal damage in layered metal films via tailoring femtosecond laser for a wide range of applications in the fields such as laser resonant cavity, photoelectric equipments, MEMS and biochips.
KW - Electron thermal diffusion
KW - Electron-phonon coupling
KW - Temporally shaped femtosecond laser
KW - Two-layer metal films
UR - https://www.scopus.com/pages/publications/84928229835
U2 - 10.1016/j.ijheatmasstransfer.2015.03.090
DO - 10.1016/j.ijheatmasstransfer.2015.03.090
M3 - 文章
AN - SCOPUS:84928229835
SN - 0017-9310
VL - 87
SP - 341
EP - 346
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
ER -