Terahertz wave emission from the trigonal layered PtBi(2).

Terahertz wave emission from the trigonal layered PtBi(2).
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三角层状 PtBi2 的太赫兹波发射

DOI:
10.1016/j.isci.2022.104511
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发表时间:
2022-07-15
期刊:
影响因子:
5.8
通讯作者:
Qi, Jingbo
Qi, Jingbo
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Gao, Yu;Pei, Yunhe;Xiang, Tian;Cheng, Liang;Qi, Jingbo

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在这项工作中,宽带太赫兹(THz)波发射已被检测到从三角层状PtBi 2的飞秒激光脉冲的激发。这种太赫兹产生被认为是由占主导地位的线性光电效应,这是进一步发现强烈依赖于独特的电子结构的PtBi 2。此外,还获得了PtBi 2的有效非线性极化率,比传统的非线性晶体的有效非线性极化率提高了近两个数量级。太赫兹波发射,拓扑半金属,超快光电流,凝聚态输运性质,辐射物理,纳米材料
In this work, broadband terahertz (THz) wave emissions have been detected from the trigonal layered PtBi2 on the excitation of the femtosecond laser pulses. Such THz generation is found to arise from the dominated linear photogalvanic effect, which is further discovered to strongly depend on the unique electronic structures of PtBi2. Furthermore, an effective nonlinear susceptibility of PtBi2 is also obtained and is nearly two orders of magnitude larger than that of the traditional nonlinear crystal for THz generation. Terahertz (THz) wave emission, topological semimetal, ultrafast photocurrent Transport property of condensed matter; Radiation physics; Nanomaterials
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