Orientation angles of liquid crystals via ultrasound vibrations

The orientation angles of liquid crystal (LC) molecules were measured during ultrasound vibrations. Light transmitted through a fabricated LC lens was analyzed via the crossed Nicol condition and a crystal rotation method. The LC orientation angle was estimated with a theoretical model, and its dist...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2022-06, Vol.61 (6), p.68002
Main Authors: Iwase, Takahiro, Kuroda, Yuma, Onaka, Jessica, Emoto, Akira, Matsukawa, Mami, Koyama, Daisuke
Format: Article
Language:English
Subjects:
acoustic radiation force
Crystal structure
lens
Lenses
liquid crystal
Liquid crystals
Orientation
Sound waves
Ultrasonic imaging
ultrasound
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Summary:The orientation angles of liquid crystal (LC) molecules were measured during ultrasound vibrations. Light transmitted through a fabricated LC lens was analyzed via the crossed Nicol condition and a crystal rotation method. The LC orientation angle was estimated with a theoretical model, and its distribution in the lens was determined. There was a strong correlation between the molecular angles and ultrasonic vibrational distributions, indicating that the angle was changed by the acoustic radiation force. The maximum tilt angle was 12° for a 50 V peak-to-peak input.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/ac6e1a