Qianlong Kang , Guoqing Xu , Xizheng Zhang , Wei Wang , Kai Guo , Zhongyi Guo
{"title":"对称性破缺元表面实现大圆极化度的宽带中红外热发射","authors":"Qianlong Kang , Guoqing Xu , Xizheng Zhang , Wei Wang , Kai Guo , Zhongyi Guo","doi":"10.1016/j.jsamd.2024.100724","DOIUrl":null,"url":null,"abstract":"<div><p>Mid-infrared (MIR) circularly polarized emission (CPE) is widely used in molecular sensing, information encryption, target detection, and optical communication. However, the generation and regulation of broadband MIR thermal emission with a large degree of circular polarization (DoCP) is still a major challenge. Here, we design a symmetry-broken chiral plasmonic metasurface consisting of asymmetric spilted-ring resonators (ASRRs) to emit broadband CPE with high purity in the MIR region of 3.4–5 μm. The simulated results show that the DoCPs at the wavelengths of 3.74 μm and 4.27 μm are 0.7 and 0.71, respectively, and the DoCP is higher than 0.5 in the wide wavelength ranges of 3.5–4.83 μm. According to the local Kirchhoff's law, the spin-dependent thermal emission originates from the strong inherent local chirality of the ASRR through the near-field distribution and the local emissivity density. Then, the effects of geometric parameters of meta-unit on the DoCP characteristics are studied in detail, which indicates that the geometric perturbation segments quantified by <em>S</em> result in the CPE regulation. Specifically, the DoCP decreases from 0.71 to 0 as the perturbation factor <em>S</em> increases from 0 to 5. Finally, we numerically demonstrate that the designed chiral plasmonic metasurface has potential applications in infrared circularly polarized light detection.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":null,"pages":null},"PeriodicalIF":6.7000,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924000558/pdfft?md5=d162c1fec9bb0d21337b02ae706dfc5c&pid=1-s2.0-S2468217924000558-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Broadband mid-infrared thermal emission with large degree of circular polarization enabled by symmetry-broken metasurfaces\",\"authors\":\"Qianlong Kang , Guoqing Xu , Xizheng Zhang , Wei Wang , Kai Guo , Zhongyi Guo\",\"doi\":\"10.1016/j.jsamd.2024.100724\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Mid-infrared (MIR) circularly polarized emission (CPE) is widely used in molecular sensing, information encryption, target detection, and optical communication. However, the generation and regulation of broadband MIR thermal emission with a large degree of circular polarization (DoCP) is still a major challenge. Here, we design a symmetry-broken chiral plasmonic metasurface consisting of asymmetric spilted-ring resonators (ASRRs) to emit broadband CPE with high purity in the MIR region of 3.4–5 μm. The simulated results show that the DoCPs at the wavelengths of 3.74 μm and 4.27 μm are 0.7 and 0.71, respectively, and the DoCP is higher than 0.5 in the wide wavelength ranges of 3.5–4.83 μm. According to the local Kirchhoff's law, the spin-dependent thermal emission originates from the strong inherent local chirality of the ASRR through the near-field distribution and the local emissivity density. Then, the effects of geometric parameters of meta-unit on the DoCP characteristics are studied in detail, which indicates that the geometric perturbation segments quantified by <em>S</em> result in the CPE regulation. Specifically, the DoCP decreases from 0.71 to 0 as the perturbation factor <em>S</em> increases from 0 to 5. Finally, we numerically demonstrate that the designed chiral plasmonic metasurface has potential applications in infrared circularly polarized light detection.</p></div>\",\"PeriodicalId\":17219,\"journal\":{\"name\":\"Journal of Science: Advanced Materials and Devices\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.7000,\"publicationDate\":\"2024-04-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2468217924000558/pdfft?md5=d162c1fec9bb0d21337b02ae706dfc5c&pid=1-s2.0-S2468217924000558-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Science: Advanced Materials and Devices\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2468217924000558\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Science: Advanced Materials and Devices","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2468217924000558","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Broadband mid-infrared thermal emission with large degree of circular polarization enabled by symmetry-broken metasurfaces
Mid-infrared (MIR) circularly polarized emission (CPE) is widely used in molecular sensing, information encryption, target detection, and optical communication. However, the generation and regulation of broadband MIR thermal emission with a large degree of circular polarization (DoCP) is still a major challenge. Here, we design a symmetry-broken chiral plasmonic metasurface consisting of asymmetric spilted-ring resonators (ASRRs) to emit broadband CPE with high purity in the MIR region of 3.4–5 μm. The simulated results show that the DoCPs at the wavelengths of 3.74 μm and 4.27 μm are 0.7 and 0.71, respectively, and the DoCP is higher than 0.5 in the wide wavelength ranges of 3.5–4.83 μm. According to the local Kirchhoff's law, the spin-dependent thermal emission originates from the strong inherent local chirality of the ASRR through the near-field distribution and the local emissivity density. Then, the effects of geometric parameters of meta-unit on the DoCP characteristics are studied in detail, which indicates that the geometric perturbation segments quantified by S result in the CPE regulation. Specifically, the DoCP decreases from 0.71 to 0 as the perturbation factor S increases from 0 to 5. Finally, we numerically demonstrate that the designed chiral plasmonic metasurface has potential applications in infrared circularly polarized light detection.
期刊介绍:
In 1985, the Journal of Science was founded as a platform for publishing national and international research papers across various disciplines, including natural sciences, technology, social sciences, and humanities. Over the years, the journal has experienced remarkable growth in terms of quality, size, and scope. Today, it encompasses a diverse range of publications dedicated to academic research.
Considering the rapid expansion of materials science, we are pleased to introduce the Journal of Science: Advanced Materials and Devices. This new addition to our journal series offers researchers an exciting opportunity to publish their work on all aspects of materials science and technology within the esteemed Journal of Science.
With this development, we aim to revolutionize the way research in materials science is expressed and organized, further strengthening our commitment to promoting outstanding research across various scientific and technological fields.