Studying time-dependent contribution of hot-electron versus lattice-induced thermal-expansion response in ultra-thin Au-nanofilms

Through the femtosecond-time-resolved study of photoacoustic pulse generation in ultra-thin gold nanofilms, we observed a time delay of 0.5–0.7 ps in the formation of thermal-expansion pulses after photoexcitation. Our observation indicates that lattice anharmonicity dominates over hot electron pres...

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Veröffentlicht in:	Applied physics letters 2020-10, Vol.117 (15), Article 154101
Hauptverfasser:	Wang, Peng-Jui, Shen, Chih-Chiang, Chou, Kuan-Yu, Ho, Mu-Han, Sheu, Jinn-Kong, Sun, Chi-Kuang
Format:	Artikel
Sprache:	eng
Schlagworte:	Anharmonicity Applied physics Electron pressure Hot electrons Photoexcitation Physical Sciences Physics Physics, Applied Science & Technology Thermal expansion Time dependence Time lag
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