{"title":"超宽带低压工作的预扭混合LC偏振旋转器","authors":"Sang-Hee Lee, Seung-Won Oh","doi":"10.1016/j.cap.2025.09.005","DOIUrl":null,"url":null,"abstract":"<div><div>We report an ultra-broadband and voltage-tunable polarization rotator based on a hybrid aligned nematic (HAN) liquid crystal cell with an intentional pre-twisted configuration. By employing a rubbing angle of ∼130° between the planar and vertical alignment layers, an initial twist angle of ∼30° is formed even in the absence of an external field. Applying a vertical electric field gradually lowers the polar angle of the LC molecules while preserving their azimuthal twist, thereby increasing their contribution to polarization rotation. The proposed structure achieves a continuous rotation of the polarization vector from 0° to 90° over a wavelength range of 200–2000 nm with a degree of linear polarization (DoLP) exceeding 0.9. Compared with previous approaches, this design operates at a significantly lower driving voltage (∼10 V) and eliminates the need for patterned electrodes, enhancing its compatibility with large-area and low-cost fabrication. The optical response is supported by director simulations and Jones matrix calculations, highlighting the physical mechanisms underlying its broadband and tunable polarization control.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"80 ","pages":"Pages 219-223"},"PeriodicalIF":3.1000,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pre-twisted hybrid LC polarization rotator with ultra-broadband and low-voltage operation\",\"authors\":\"Sang-Hee Lee, Seung-Won Oh\",\"doi\":\"10.1016/j.cap.2025.09.005\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>We report an ultra-broadband and voltage-tunable polarization rotator based on a hybrid aligned nematic (HAN) liquid crystal cell with an intentional pre-twisted configuration. By employing a rubbing angle of ∼130° between the planar and vertical alignment layers, an initial twist angle of ∼30° is formed even in the absence of an external field. Applying a vertical electric field gradually lowers the polar angle of the LC molecules while preserving their azimuthal twist, thereby increasing their contribution to polarization rotation. The proposed structure achieves a continuous rotation of the polarization vector from 0° to 90° over a wavelength range of 200–2000 nm with a degree of linear polarization (DoLP) exceeding 0.9. Compared with previous approaches, this design operates at a significantly lower driving voltage (∼10 V) and eliminates the need for patterned electrodes, enhancing its compatibility with large-area and low-cost fabrication. The optical response is supported by director simulations and Jones matrix calculations, highlighting the physical mechanisms underlying its broadband and tunable polarization control.</div></div>\",\"PeriodicalId\":11037,\"journal\":{\"name\":\"Current Applied Physics\",\"volume\":\"80 \",\"pages\":\"Pages 219-223\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-09-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Current Applied Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1567173925001841\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Current Applied Physics","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1567173925001841","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Pre-twisted hybrid LC polarization rotator with ultra-broadband and low-voltage operation
We report an ultra-broadband and voltage-tunable polarization rotator based on a hybrid aligned nematic (HAN) liquid crystal cell with an intentional pre-twisted configuration. By employing a rubbing angle of ∼130° between the planar and vertical alignment layers, an initial twist angle of ∼30° is formed even in the absence of an external field. Applying a vertical electric field gradually lowers the polar angle of the LC molecules while preserving their azimuthal twist, thereby increasing their contribution to polarization rotation. The proposed structure achieves a continuous rotation of the polarization vector from 0° to 90° over a wavelength range of 200–2000 nm with a degree of linear polarization (DoLP) exceeding 0.9. Compared with previous approaches, this design operates at a significantly lower driving voltage (∼10 V) and eliminates the need for patterned electrodes, enhancing its compatibility with large-area and low-cost fabrication. The optical response is supported by director simulations and Jones matrix calculations, highlighting the physical mechanisms underlying its broadband and tunable polarization control.
期刊介绍:
Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications.
Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques.
Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals.
Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review.
The Journal is owned by the Korean Physical Society.