{"title":"基于 PIT 现象和洛伦兹理论的新型太赫兹光开关","authors":"Jun Zhu , Xiner Chen , Liuli Qin","doi":"10.1016/j.isci.2024.111301","DOIUrl":null,"url":null,"abstract":"<div><div>We propose and demonstrate a structure consisting of graphene rings and square rings that enables broadband and tunable plasmon-induced transparency (PIT) effects. Through coupled Lorentz model analysis, we attribute the transmission window at 2.1 THz to the interference between the equipartitioned exciton resonance of the graphene ring pairs and the inductive-capacitive resonance of the graphene square ring pairs. We also investigate the effect of the variation of the rotation angle of the internal graphene square ring pair on the transmission characteristics. The structure not only achieves a maximum modulation depth (MDA) of 91%, insertion loss (IL) and extinction ratio (ER) of 0.3 dB and 10.94 dB, respectively, but also achieves a maximum detection sensitivity of 0.96 THz/refractive index unit (RIU). In contrast, this study achieves more than 90% modulation amplitude in the range of 0.3 THz with a simple design structure, providing new insights for research and applications in related fields.</div></div>","PeriodicalId":342,"journal":{"name":"iScience","volume":"27 12","pages":"Article 111301"},"PeriodicalIF":4.6000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Novel terahertz optical switch based on PIT phenomenon and Lorentz theory\",\"authors\":\"Jun Zhu , Xiner Chen , Liuli Qin\",\"doi\":\"10.1016/j.isci.2024.111301\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>We propose and demonstrate a structure consisting of graphene rings and square rings that enables broadband and tunable plasmon-induced transparency (PIT) effects. Through coupled Lorentz model analysis, we attribute the transmission window at 2.1 THz to the interference between the equipartitioned exciton resonance of the graphene ring pairs and the inductive-capacitive resonance of the graphene square ring pairs. We also investigate the effect of the variation of the rotation angle of the internal graphene square ring pair on the transmission characteristics. The structure not only achieves a maximum modulation depth (MDA) of 91%, insertion loss (IL) and extinction ratio (ER) of 0.3 dB and 10.94 dB, respectively, but also achieves a maximum detection sensitivity of 0.96 THz/refractive index unit (RIU). In contrast, this study achieves more than 90% modulation amplitude in the range of 0.3 THz with a simple design structure, providing new insights for research and applications in related fields.</div></div>\",\"PeriodicalId\":342,\"journal\":{\"name\":\"iScience\",\"volume\":\"27 12\",\"pages\":\"Article 111301\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2024-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"iScience\",\"FirstCategoryId\":\"103\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2589004224025264\",\"RegionNum\":2,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MULTIDISCIPLINARY SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"iScience","FirstCategoryId":"103","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2589004224025264","RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
Novel terahertz optical switch based on PIT phenomenon and Lorentz theory
We propose and demonstrate a structure consisting of graphene rings and square rings that enables broadband and tunable plasmon-induced transparency (PIT) effects. Through coupled Lorentz model analysis, we attribute the transmission window at 2.1 THz to the interference between the equipartitioned exciton resonance of the graphene ring pairs and the inductive-capacitive resonance of the graphene square ring pairs. We also investigate the effect of the variation of the rotation angle of the internal graphene square ring pair on the transmission characteristics. The structure not only achieves a maximum modulation depth (MDA) of 91%, insertion loss (IL) and extinction ratio (ER) of 0.3 dB and 10.94 dB, respectively, but also achieves a maximum detection sensitivity of 0.96 THz/refractive index unit (RIU). In contrast, this study achieves more than 90% modulation amplitude in the range of 0.3 THz with a simple design structure, providing new insights for research and applications in related fields.
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