{"title":"Terahertz polarization conversion and asymmetric transmission based on a liquid crystal integrated EIT metasurface.","authors":"Shi-Tong Xu, Junxing Fan, Zhanqiang Xue, Jiandi Li, Ying-Hua Wang, Yue Pan, Hong-Zhong Cao, Ren-De Ma, Dan Lu, Hui-Fang Zhang, Longqing Cong","doi":"10.1364/OL.537007","DOIUrl":null,"url":null,"abstract":"<p><p>We experimentally demonstrate a liquid crystal (LC)-integrated EIT metasurface for active THz polarization conversion and asymmetric transmission. By controlling the LC orientation under static magnetic field anchoring and an adjustable electric field, the device realizes the active control from the OFF state to the ON state, corresponding to the orthogonal polarization excitation modes of the EIT metasurface. Furthermore, based on the different polarization responses at forward and backward incidences, we achieve asymmetric transmission at the EIT peak and two nearby resonances, with its isolation actively manipulated by the external electric field. This study on dynamic polarization conversion and asymmetric transmission by a LC-integrated metasurface offers a promising route for active THz devices, applicable to THz communication, switching, and sensing systems.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"49 17","pages":"4891-4894"},"PeriodicalIF":3.1000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.537007","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
We experimentally demonstrate a liquid crystal (LC)-integrated EIT metasurface for active THz polarization conversion and asymmetric transmission. By controlling the LC orientation under static magnetic field anchoring and an adjustable electric field, the device realizes the active control from the OFF state to the ON state, corresponding to the orthogonal polarization excitation modes of the EIT metasurface. Furthermore, based on the different polarization responses at forward and backward incidences, we achieve asymmetric transmission at the EIT peak and two nearby resonances, with its isolation actively manipulated by the external electric field. This study on dynamic polarization conversion and asymmetric transmission by a LC-integrated metasurface offers a promising route for active THz devices, applicable to THz communication, switching, and sensing systems.
我们在实验中展示了一种用于主动太赫兹偏振转换和非对称传输的液晶（LC）集成 EIT 元表面。通过在静态磁场锚定和可调电场条件下控制液晶取向，该器件实现了从 "关 "到 "开 "的主动控制，与 EIT 元表面的正交偏振激发模式相对应。此外，基于正向和反向发生时不同的极化响应，我们在 EIT 峰值和附近的两个共振处实现了非对称传输，其隔离可由外部电场主动控制。这项关于液相色谱集成元表面的动态极化转换和非对称传输的研究为有源太赫兹器件提供了一条前景广阔的途径，适用于太赫兹通信、开关和传感系统。
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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