{"title":"Electric field controlled switching of an optical vortex charge with a liquid crystal cell","authors":"Oleh Krupych , Taras Dudok , Ihor Skab , Yuriy Nastishin , Zinaida Hrabchak , Albert Chernenko , Oleksandr Buluy , Pavlo Zelenov , Vassili Nazarenko , Oleksandr Kurochkin , Rostyslav Vlokh","doi":"10.1016/j.optcom.2025.131593","DOIUrl":null,"url":null,"abstract":"<div><div>Relations between the topological charge <em>l</em> of the optical vortex and the topological strength <em>s</em> of the nematic defect generating it are discussed. A voltage-driven effect switching the optical vortex charge from |<em>l</em>| = 1 to |<em>l</em>| = 2 for a nematic cell assembled from substrates providing circular and linear planar alignment of the nematic director is reported. The switching of the optical vortex charge is evidenced by the transformations of two into four extinction brushes in the optical polarization texture and of the single-spiral into the double-spiral pattern in the Mach-Zehnder interferograms.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"579 ","pages":"Article 131593"},"PeriodicalIF":2.2000,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics Communications","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S003040182500121X","RegionNum":3,"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}
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Abstract
Relations between the topological charge l of the optical vortex and the topological strength s of the nematic defect generating it are discussed. A voltage-driven effect switching the optical vortex charge from |l| = 1 to |l| = 2 for a nematic cell assembled from substrates providing circular and linear planar alignment of the nematic director is reported. The switching of the optical vortex charge is evidenced by the transformations of two into four extinction brushes in the optical polarization texture and of the single-spiral into the double-spiral pattern in the Mach-Zehnder interferograms.
期刊介绍：
Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.
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