物理
光学
光子晶体
光子学
奇偶性(物理)
互易晶格
互惠的
光束
凝聚态物理
原子物理学
语言学
哲学
衍射
作者
Hao Ni,Guopeng Zhou,Xiaoling Chen,Dong Zhao,Yan Wang
出处
期刊:Optics Express
[The Optical Society]
日期:2023-01-03
卷期号:31 (2): 1234-1234
被引量:5
摘要
We theoretically investigate the Goos-Hänchen (GH) shifts of reflected light beams in Thue-Morse photonic crystals. The systems are constituted by two Thue-Morse dielectrics multilayers and satisfy parity-time (PT) symmetry. Double coherent perfect absorption laser points (CPA-LPs) are achieved in the parameter space composed of the incident angle and the gain-loss factor. Dramatic changes in the phase of reflection coefficient induce giant positive and negative spatial GH shifts at the CPA-LPs, while great angular GH shifts exist around the exceptional points (EPs). The spatial GH shifts present non-reciprocity for the forward and backward incident light waves near the double CPA-LPs, while the angular GH shifts are quasi-reciprocal. Increasing the Thue-Morse sequence number, these characteristics are approved around multiple CPA-LPs as well. Our work could pave the way to explore high-accuracy optical sensors.
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