拓扑绝缘体
高次谐波产生
极化(电化学)
圆极化
物理
拓扑(电路)
超短脉冲
激光器
二次谐波产生
线极化
凝聚态物理
光学
量子力学
磁场
化学
组合数学
物理化学
数学
作者
Denitsa Baykusheva,Alexis Chacón,Jian Lu,Trevor P. Bailey,Jonathan A. Sobota,Hadas Soifer,Patrick S. Kirchmann,C. R. Rotundu,Ctirad Uher,Tony F. Heinz,David A. Reis,Shambhu Ghimire
出处
期刊:Nano Letters
[American Chemical Society]
日期:2021-10-22
卷期号:21 (21): 8970-8978
被引量:52
标识
DOI:10.1021/acs.nanolett.1c02145
摘要
We report the observation of an anomalous nonlinear optical response of the prototypical three-dimensional topological insulator bismuth selenide through the process of high-order harmonic generation. We find that the generation efficiency increases as the laser polarization is changed from linear to elliptical, and it becomes maximum for circular polarization. With the aid of a microscopic theory and a detailed analysis of the measured spectra, we reveal that such anomalous enhancement encodes the characteristic topology of the band structure that originates from the interplay of strong spin-orbit coupling and time-reversal symmetry protection. The implications are in ultrafast probing of topological phase transitions, light-field driven dissipationless electronics, and quantum computation.
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