Photonics Research, 2020, 8 (12): 12000B47, Published Online: Nov. 10, 2020  

Weak-value amplification for the optical signature of topological phase transitions Download: 614次

Author Affiliations
1 Laboratory for Spin Photonics, School of Physics and Electronics, Hunan University, Changsha 410082, China
2 Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, USA
3 Materials Science and Engineering Program, University of Colorado, Boulder, Colorado 80309, USA
4 e-mail: hailuluo@hnu.edu.cn
5 e-mail: xiaobo.yin@colorado.edu
Abstract
We show that weak measurements can be used to measure the tiny signature of topological phase transitions. The signature is an in-plane photonic spin Hall effect, which can be described as a consequence of a Berry phase. It is also parallel to the propagation direction of a light beam. The imaginary part of the weak value can be used to analyze ultrasmall longitudinal phase shifts in different topological phases. These optical signatures are related to the Chern number and bandgaps; we also use a preselection and postselection technique on the spin state to enhance the original signature. The weak amplification technique offers a potential way to determine the spin and valley properties of charge carriers, Chern numbers, and topological phases by direct optical measurement.

Weijie Wu, Shizhen Chen, Wenhao Xu, Zhenxing Liu, Runnan Lou, Lihua Shen, Hailu Luo, Shuangchun Wen, Xiaobo Yin. Weak-value amplification for the optical signature of topological phase transitions[J]. Photonics Research, 2020, 8(12): 12000B47.

引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!