Acoustic phonon excitation in gold probed by time-resolved photoemission electron microscopy

被引:0
作者
Jiang, Pengzuo [1 ,2 ]
Zhang, Linfeng [1 ,2 ]
Zheng, Wei [1 ,2 ]
Wang, Yang [1 ,2 ]
Liu, Yu [1 ,2 ]
Xiao, Jingying [1 ,2 ]
Li, Yaolong [1 ,2 ]
Medvedev, Nikita [3 ,4 ]
Ischenko, Anatoly [5 ]
Kang, Zexin [1 ,2 ]
Liu, Yunquan [1 ,2 ,6 ,7 ]
Li, Zheng [1 ,2 ,6 ,7 ]
Wu, Chengyin [1 ,2 ,6 ,7 ]
机构
[1] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
[2] Peking Univ, Sch Phys, Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
[3] Czech Acad Sci, Inst Phys, Na Slovance 1999-2, Prague 8, Czech Republic
[4] Czech Acad Sci, Inst Plasma Phys, Za Slovankou 3, Prague 8, Czech Republic
[5] RTU MIREA Russian Technol Univ, Lomonosov Inst Fine Chem Technol, Vernadskii Ave 86, Moscow 119571, Russia
[6] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
[7] Peking Univ, Yangtze Delta Inst Optoelect, Nantong 226010, Jiangsu, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金; 北京市自然科学基金;
关键词
OPTICAL PHONONS; TEMPERATURE; RADIATION; EMISSION; FIELD; AU;
D O I
10.1063/5.0213237
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Electron-phonon coupling is an important energy transfer mechanism in solids after ultrafast laser excitation. In this study, we present an extreme ultraviolet (EUV) and infrared (IR) pump-probe photoemission experiment to investigate the electron-phonon coupling in nonequilibrium gold. The energy of IR-laser-emitted photoelectrons is shifted due to the EUV photoemission and oscillates with a similar to 4THz frequency. Such oscillation is considered as the effective excitation of the longitudinal acoustic phonon mode in gold through the spectral-dependent electron-phonon coupling. Our study showcases the capability of time-resolved photoemission electron microscopy to monitor the non-equilibrium lattice vibrations with ultrahigh spatial and temporal resolution.
引用
收藏
页数:7
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