{"title":"Strong spinning thermal radiation enabled by Germanium-based chiral dielectric metasurface","authors":"Xu Guo, Biyuan Wu, Hongju Li, Haotuo Liu, Xiaohu Wu, Ying Gao","doi":"10.1088/2040-8986/ad61fc","DOIUrl":null,"url":null,"abstract":"\n Spinning thermal radiation refers to the phenomenon of selective emission of circularly polarized waves from chiral structures with polarization dependence or symmetry breaking. This phenomenon finds diverse applications in fields such as radiation detection and chiral sensing. In this study, we introduce a dielectric metasurface composed of a periodic arrangement of Germanium (Ge) elliptical disks, which can exhibit circular dichroism (CD) with a maximum value of approximately 0.93 at the optimal structural parameters. The physical mechanism of the strong CD is analyzed through the polarization conversion and distributions of the electric field. Moreover, the influence of structural parameters on the spinning thermal radiation is also analyzed. It is found that the CD is closely related to the height and period of the Ge-based chiral dielectric metasurface rather than the rotation angle. This work not only provides valuable insights into the design and optimization of spinning thermal radiation using metasurfaces, but also holds promise for its engineering applications in the field of thermal detection.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"64 12","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Optics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/2040-8986/ad61fc","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Spinning thermal radiation refers to the phenomenon of selective emission of circularly polarized waves from chiral structures with polarization dependence or symmetry breaking. This phenomenon finds diverse applications in fields such as radiation detection and chiral sensing. In this study, we introduce a dielectric metasurface composed of a periodic arrangement of Germanium (Ge) elliptical disks, which can exhibit circular dichroism (CD) with a maximum value of approximately 0.93 at the optimal structural parameters. The physical mechanism of the strong CD is analyzed through the polarization conversion and distributions of the electric field. Moreover, the influence of structural parameters on the spinning thermal radiation is also analyzed. It is found that the CD is closely related to the height and period of the Ge-based chiral dielectric metasurface rather than the rotation angle. This work not only provides valuable insights into the design and optimization of spinning thermal radiation using metasurfaces, but also holds promise for its engineering applications in the field of thermal detection.
旋转热辐射是指具有偏振依赖性或对称性破缺的手性结构选择性发射圆偏振波的现象。这种现象在辐射探测和手性传感等领域有着广泛的应用。在本研究中,我们介绍了一种介电元表面,它由周期性排列的锗(Ge)椭圆盘组成,在最佳结构参数下可表现出最大值约为 0.93 的圆二色性(CD)。通过极化转换和电场分布分析了强 CD 的物理机制。此外,还分析了结构参数对旋转热辐射的影响。研究发现,CD 与 Ge 基手性介电元表面的高度和周期密切相关,而与旋转角度无关。这项工作不仅为利用元表面设计和优化旋转热辐射提供了宝贵的见解,还为其在热探测领域的工程应用带来了希望。