Effect of the concentration of chiral compound on the photorefractive effect of flexoelectric smectic liquid crystal blends. Issue 1 (1st September 2022)

• Record Type: Journal Article
• Authors: Sasaki, Takeo; Hara, Takuya; Hirakawa, Maho; Suzuki, Kaita; Van Le, Khoa; Naka, Yumiko
• Is Part Of: Molecular crystals and liquid crystals. Volume 740:Issue 1(2023)
• Page Start: 1
• Page End: 16
• Publication Date: 2022-09-01
• Subjects: Asymmetric energy exchange -- chiral smectic C phase -- flexoelectric effect -- photorefractive effect -- two beam coupling; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2022.2031773
• Languages: English
• ISSNs: 1542-1406

Abstract

Abstract: The photorefractive effect of flexoelectric smectic liquid crystal blends was investigated. Smectic liquid crystal blends, composed of smectic-C liquid crystals, photoconductive chiral compounds and a sensitizer, are known to exhibit a large photorefractive effect. The chiral compound plays a critical role in the exhibition of large photorefractivity in smectic liquid crystals. The concentration of the chiral compound was varied and the photorefractive properties of the liquid crystal blend were examined. It was found that smectic-C liquid crystals containing small amounts of a chiral compound show a large photorefractivity even though they do not possess spontaneous polarizations.