Ultrafast thermal excitation behaviors of Au films irradiated by polarization-shaped femtosecond laser

Yan Ou; Yu Lu; Guangqing Du; Feng Chen; Qing Yang; Yanmin Wu

doi:10.1117/12.2075513

19 February 2015 Ultrafast thermal excitation behaviors of Au films irradiated by polarization-shaped femtosecond laser

Yan Ou, Yu Lu, Guangqing Du, Feng Chen, Qing Yang, Yanmin Wu

Proceedings Volume 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014); 944918 (2015) https://doi.org/10.1117/12.2075513
Event: The International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference (icPOE 2014), 2014, Xi'an, China

Abstract

We theoretically investigated the ultrafast thermal excitation behaviors on Au films surface irradiated by polarization-shaped femtosecond laser. The spatio-temporal dynamics of temperature evolution in Au film with polarization-shaped femtosecond laser excitation are obtained based on Finite Element Method (FEM). It is revealed that the phonon temperature fields can be flexibly adjusted by optimizing the polarization state combinations of polarization-shaped double femtosecond laser pulses. The results are attributed to pulse synthetic effect, which closely depends on the polarization state combinations of double femtosecond laser pulses. The study provides the basic for understanding of the thermal excitation dynamics for optimizing laser micro and nano-fabrications via tailoring the polarization state of temporally shaped femtosecond laser.

Citation Download Citation

Yan Ou, Yu Lu, Guangqing Du, Feng Chen, Qing Yang, and Yanmin Wu "Ultrafast thermal excitation behaviors of Au films irradiated by polarization-shaped femtosecond laser", Proc. SPIE 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014), 944918 (19 February 2015); https://doi.org/10.1117/12.2075513

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