Competing Interplay of Photo-thermal and Photo-doping Effect during Light-induced Ultrafast Insulator-to-Metal Transition in VO2 Nanofilms at Terahertz Frequency

被引：0
|
作者：
Zhai, Zhao-Hui [1 ]
Du, Liang-Hui [1 ]
Chen, Si-Chao [1 ,2 ]
Zhu, Li-Guo [1 ]
机构：
[1] China Acad Engn Phys, Inst Fluid Phys, Mianyang 621900, Sichuan, Peoples R China
[2] Univ Sci & Technol China, Dept Opt & Opt Engn, Hefei 230026, Anhui, Peoples R China
来源：
2019 44TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ) | 2019年
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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：
The competing interplay of photo-thermal and photo-doping effect of VO2 nanofilm under fs laser excitation was studied at terahertz frequency. We find that with photo-thermal effect generated by fs laser pulses, both the character time constant of insulator-to-metal phase transition and the pump fluence threshold of transition were decreased, while the amplitudes of the two photo-response are competing.
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