Ultrafast dynamics of optical phonons in α-quartz launched by THz wave and femtosecond laser combined excitation source

被引：1
作者：
Ma, Danni [1 ]
Dong, Liquan [1 ]
Zhao, Yuej In [1 ]
Zhang, Cunlin [2 ,3 ]
Weber, Cedric [4 ]
Shalaby, Mostafa [2 ,3 ]
Zhang, Liangliang [2 ,3 ]
机构：
[1] Beijing Inst Technol, Sch Opt & Photon, Beijing Key Lab Precis Optoelect Measurement Inst, Beijing 100081, Peoples R China
[2] Capital Normal Univ, Beijing Adv Innovat Ctr Imaging Technol, Beijing 100048, Peoples R China
[3] Capital Normal Univ, Key Lab Terahertz Optoelect MoE, Dept Phys, Beijing 100048, Peoples R China
[4] Kings Coll London, London WC2R 2LS, England
来源：
2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ) | 2021年
关键词：
D O I：
10.1109/IRMMW-THz50926.2021.9567232
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We use the terahertz (THz) wave generated from the 1550 nm femtosecond laser excited DAST crystal and an 800 nm femtosecond laser to jointly focus on the alpha-quartz crystal, and prompt it to produce ultrafast coherent phonon dynamic effect. The experimental phenomena were detected by means of THz Time-Domain Spectroscopy. We found that when the two excitation beams have different relative time delays, the oscillation frequencies of the phonon generated by the quartz crystal shift. It is of great importance for us to study phonon dynamics of quartz crystal and other materials.
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页数：2
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