ItemArticle

Fabrication of liquid-crystal retarders for solar polarimetry: A facile method

Title
Fabrication of liquid-crystal retarders for solar polarimetry: A facile method
Creator
Phanindra, D.V.S.; Greeshma, L.S.; Vincent, Della; Raees, Muhammed; Nagaraju, K.; Hegde, Gurumurthy; Sreekumar, P.; Namboothiry, Manoj A. G.
Description
A high-precision polarimeter for simultaneous multi-line spectropolarimetric Sun observations is under development at Indian Institute of Astrophysics. Towards this end, we plan to use liquid-crystal retarders as the polarization modulators. A prototype liquid-crystal variable retarder (LCVR) is fabricated and characterized. A solution-processed method is adapted to fabricate the LCVR using commercially available E7 nematic liquid-crystal material. Thickness of the alignment layer of the LC retarder was optimized to achieve uniformity. The fabricated LCVR demonstrates spatial uniformity of retardance comparable to a commercial waveplate. The device is found to have a low-range of operational voltage of <20 V and a very short response time of <1 ms. Also, the device shows consistent operational stability. Indian Academy of Sciences 2025.
Source
Journal of Astrophysics and Astronomy;Volume;46;Issue;2;Article No.;43;
Date
01-01-2025
Publisher
Springer
Subject
fabrication; LCVR; Polarimetry
Coverage
Phanindra D.V.S., Indian Institute of Astrophysics, Bangalore, 560034, India; Greeshma L.S., School of Physics, Indian Institute of Science Education and Research, Maruthamala P.O., Vithura, Thiruvananthapuram, 695551, India; Vincent D., Indian Institute of Astrophysics, Bangalore, 560034, India; Raees M., School of Physics, Indian Institute of Science Education and Research, Maruthamala P.O., Vithura, Thiruvananthapuram, 695551, India; Nagaraju K., Indian Institute of Astrophysics, Bangalore, 560034, India; Hegde G., Center for Advanced Research and Development, Christ University (Deemed to be University), Dharmaram College Post, Hosur Road, Bangalore, 560029, India; Sreekumar P., Manipal Centre for Natural Sciences, Manipal Academy of Higher Education, Eshwar Nagar, Manipal, 576104, India; Namboothiry M.A.G., School of Physics, Indian Institute of Science Education and Research, Maruthamala P.O., Vithura, Thiruvananthapuram, 695551, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 2506335;
Format
online
Language
English
Type
Article

Citation

Phanindra, D.V.S.; Greeshma, L.S.; Vincent, Della; Raees, Muhammed; Nagaraju, K.; Hegde, Gurumurthy; Sreekumar, P.; Namboothiry, Manoj A. G., “Fabrication of liquid-crystal retarders for solar polarimetry: A facile method,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/21989.

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