In situ control of the photoinduced birefringence of photoalignable liquid crystalline polymeric films

Nobuhiro Kawatsuki; Ryota Oya; Mizuho Kondo; Moritsugu Sakamoto; Hiroshi Ono

doi:10.1117/12.3026918

30 September 2024 In situ control of the photoinduced birefringence of photoalignable liquid crystalline polymeric films

Nobuhiro Kawatsuki, Ryota Oya, Mizuho Kondo, Moritsugu Sakamoto, Hiroshi Ono

Author Affiliations +

Proceedings Volume 13121, Liquid Crystals XXVIII; 1312104 (2024) https://doi.org/10.1117/12.3026918
Event: Organic Photonics + Electronics, 2024, San Diego, California, United States

Abstract

Photoalignment is one the important techniques to fabricate flat panel displays, birefringent functional films, and polarized optical diffraction devises. Thinner optical devises are attained when the optical film exhibits high birefringence. We investigated systematic studies on photoalignable liquid crystalline polymers (PLCPs), which achieve molecularly oriented structure for themselves, showing the bulk-photoalignment. This paper describes new PLCPs which reveal high photosensitivity, high photoalignability, and controllability of generated birefringence by means of in situ modification of the oriented mesogenic side groups. The initial generated birefringence of the PLCP films is 0.15, whereas the improved birefringence exceeds 0.4 is achieved via in situ modification of the oriented mesogenic side groups. Using PLCP films, polarization gratings are fabricated.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Nobuhiro Kawatsuki, Ryota Oya, Mizuho Kondo, Moritsugu Sakamoto, and Hiroshi Ono "In situ control of the photoinduced birefringence of photoalignable liquid crystalline polymeric films", Proc. SPIE 13121, Liquid Crystals XXVIII, 1312104 (30 September 2024); https://doi.org/10.1117/12.3026918

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