Robust angular anisotropy of circularly polarized luminescence from chiral π-conjugated polymer microspheres with twisted bipolar configuration

Yohei Yamamoto; Osamu Oki; Hiroshi Yamagishi; Takashige Omatsu

doi:10.1117/12.2658794

8 December 2022 Robust angular anisotropy of circularly polarized luminescence from chiral π-conjugated polymer microspheres with twisted bipolar configuration

Yohei Yamamoto, Osamu Oki, Hiroshi Yamagishi, Takashige Omatsu

Author Affiliations +

Proceedings Volume 12479, Optical Manipulation and Structured Materials Conference (OMC 2022); 124790D (2022) https://doi.org/10.1117/12.2658794
Event: Optics and Photonics International Congress, 2022, Yokohama, Japan

Abstract

Here we show that conjugated polymers bearing chiral side chains self-assemble into solid microspheres with a twisted bipolar interior. The resultant microspheres, when dispersed in methanol, exhibit CPL with a g_lum value as high as 0.23. The microspheres are mechanically robust enough to be handled with a microneedle under ambient conditions, allowing comprehensive examination of the angular anisotropy of CPL. The single microsphere is found to exhibit distinct angularly anisotropic birefringence and CPL with g_lum up to ∼0.5 in the equatorial plane, which is 2.5-fold greater than that along the polar axis. Such optically anisotropic solid materials are important for the application to micrometer-scale light-emitting, visualizing, and optical vortex generation devices.

Citation Download Citation

Yohei Yamamoto, Osamu Oki, Hiroshi Yamagishi, and Takashige Omatsu "Robust angular anisotropy of circularly polarized luminescence from chiral π-conjugated polymer microspheres with twisted bipolar configuration", Proc. SPIE 12479, Optical Manipulation and Structured Materials Conference (OMC 2022), 124790D (8 December 2022); https://doi.org/10.1117/12.2658794

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KEYWORDS

Polymers

Anisotropy

Luminescence

Liquid crystals

Supramolecular assemblies

Molecules

Optical vortices

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