Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse
Source abstract
Abstract
We measured transient reflectivity of single-crystalline and polycrystalline gold thin films in the wavelength region of 450–700 nm pumped by a 400 nm femtosecond pulse. The observed reflectivity changes were reproduced well by a reflectivity model that we developed based on the joint-density-of-states calculated from the band structure of gold and the Drude model. By a combination use of the reflectivity model and the two-temperature model, we evaluated the temporal evolution of the electron and phonon temperatures from the observed reflectivity changes. Based on the resultant electron and phonon temperatures, we derived the electron–phonon coupling factors, which were consistent with the literature values, in the wide range of the absorbed energy density.
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Research context
OpenAlex topics: Laser Material Processing Techniques · Laser-induced spectroscopy and plasma · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, School of Science, The University of Tokyo 1 , 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
Department of Physics, Indian Institute of Technology Bombay 2 , Mumbai 400076, India
Funding
Strategic Fund for Strengthening Leading-Edge Research and Development · Japan Society for the Promotion of Science · Center of Innovation Program · Department of Biotechnology, Ministry of Science and Technology, India · Science and Engineering Research Board · Department of Science and Technology, Ministry of Science and Technology, India · Wadhwani Research Center for Biotechnology · Dhananjay Joshi Endowment Fund · JSPS-DST Bilateral Joint Research Projects/Seminars
References (53)
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