{"title":"利用表面等离子体共振现象检测液晶纯度","authors":"Vaibhav Sharma, Aloka Sinha","doi":"10.1007/s11468-024-02313-5","DOIUrl":null,"url":null,"abstract":"<p>The development of Liquid crystals (LCs) based technology is happening at a quick pace to design various switchable optical devices due to the exceptional electro-optical properties of LCs. The purity of an LC is the primary concern for these applications. Here, we propose a straightforward and effective optical method to detect the purity of an LC using surface plasmon resonance phenomena. The Kretschmann configuration is used in the proposed technique, and an LC cavity is formed over the metal layer using a glass substrate. Various impurities are added in the pure LC, which disturbs the molecular arrangement of the LC molecules, and hence, the refractive index of LC changes. We have numerically calculated and experimentally observed the shift in the resonance angle for the impure LC as compared to the pure one. The impurity in the LC is evident from the significant shift in the resonance angle. The experimentally measured sensitivity of the proposed technique is around 150<sup>0</sup>/RIU, which is comparable to the other Kretschmann configuration-based sensors. This sensitivity is suitable for LC material, especially for their uses in optics and photonics applications. In comparison to the existing LC purity detection method, the key advantages of the proposed method are its lightweight, compact design, label-free detection, and real-time monitoring capabilities.</p>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Liquid Crystal Purity Detection Using Surface Plasmon Resonance Phenomena\",\"authors\":\"Vaibhav Sharma, Aloka Sinha\",\"doi\":\"10.1007/s11468-024-02313-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The development of Liquid crystals (LCs) based technology is happening at a quick pace to design various switchable optical devices due to the exceptional electro-optical properties of LCs. The purity of an LC is the primary concern for these applications. Here, we propose a straightforward and effective optical method to detect the purity of an LC using surface plasmon resonance phenomena. The Kretschmann configuration is used in the proposed technique, and an LC cavity is formed over the metal layer using a glass substrate. Various impurities are added in the pure LC, which disturbs the molecular arrangement of the LC molecules, and hence, the refractive index of LC changes. We have numerically calculated and experimentally observed the shift in the resonance angle for the impure LC as compared to the pure one. The impurity in the LC is evident from the significant shift in the resonance angle. The experimentally measured sensitivity of the proposed technique is around 150<sup>0</sup>/RIU, which is comparable to the other Kretschmann configuration-based sensors. This sensitivity is suitable for LC material, especially for their uses in optics and photonics applications. In comparison to the existing LC purity detection method, the key advantages of the proposed method are its lightweight, compact design, label-free detection, and real-time monitoring capabilities.</p>\",\"PeriodicalId\":736,\"journal\":{\"name\":\"Plasmonics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2024-04-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plasmonics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1007/s11468-024-02313-5\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasmonics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1007/s11468-024-02313-5","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Liquid Crystal Purity Detection Using Surface Plasmon Resonance Phenomena
The development of Liquid crystals (LCs) based technology is happening at a quick pace to design various switchable optical devices due to the exceptional electro-optical properties of LCs. The purity of an LC is the primary concern for these applications. Here, we propose a straightforward and effective optical method to detect the purity of an LC using surface plasmon resonance phenomena. The Kretschmann configuration is used in the proposed technique, and an LC cavity is formed over the metal layer using a glass substrate. Various impurities are added in the pure LC, which disturbs the molecular arrangement of the LC molecules, and hence, the refractive index of LC changes. We have numerically calculated and experimentally observed the shift in the resonance angle for the impure LC as compared to the pure one. The impurity in the LC is evident from the significant shift in the resonance angle. The experimentally measured sensitivity of the proposed technique is around 1500/RIU, which is comparable to the other Kretschmann configuration-based sensors. This sensitivity is suitable for LC material, especially for their uses in optics and photonics applications. In comparison to the existing LC purity detection method, the key advantages of the proposed method are its lightweight, compact design, label-free detection, and real-time monitoring capabilities.
期刊介绍:
Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons.
Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.