Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse
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-sta...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2022-09-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0090466 |
| _version_ | 1817980703428575232 |
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| author | Ryosuke Hayashi Atsushi Iwasaki Parinda Vasa Kaoru Yamanouchi |
| author_facet | Ryosuke Hayashi Atsushi Iwasaki Parinda Vasa Kaoru Yamanouchi |
| author_sort | Ryosuke Hayashi |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T22:56:34Z |
| format | Article |
| id | doaj.art-64af91c2ab944151bfdf8d1fcb6281ad |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-13T22:56:34Z |
| publishDate | 2022-09-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-64af91c2ab944151bfdf8d1fcb6281ad2022-12-22T02:25:59ZengAIP Publishing LLCAIP Advances2158-32262022-09-01129095207095207-1010.1063/5.0090466Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulseRyosuke Hayashi0Atsushi Iwasaki1Parinda Vasa2Kaoru Yamanouchi3Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, JapanDepartment of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, JapanDepartment of Physics, Indian Institute of Technology Bombay, Mumbai 400076, IndiaDepartment of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, JapanWe 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.http://dx.doi.org/10.1063/5.0090466 |
| spellingShingle | Ryosuke Hayashi Atsushi Iwasaki Parinda Vasa Kaoru Yamanouchi Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse AIP Advances |
| title | Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse |
| title_full | Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse |
| title_fullStr | Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse |
| title_full_unstemmed | Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse |
| title_short | Determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse |
| title_sort | determination of electron and phonon temperatures in gold thin film irradiated with an ultrashort laser pulse |
| url | http://dx.doi.org/10.1063/5.0090466 |
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