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Proceedings Paper

Numerical studies on self-organized liquid crystal micro photonic systems
Author(s): Tatsunosuke Matsui; Masahiro Kitaguchi; Akiko Okajima
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Paper Abstract

The liquid crystals (LCs) form various types of nano- and micro- structures in a self-organized manner. In recent years, numerous studies have been carried out to develop novel types of optical functional materials and devices utilizing such self-organizing characteristics of the LCs. Based on the finite-difference time-domain (FDTD) method or its extended version, auxiliary differential equation FDTD (ADE-FDTD) method, we have been numerically studying on the optical characteristics and functionalities of the self-organized LCs such as: (1) lasing from the cholesteric LCs (CLCs) and (2) photonic nanojet (PNJ) from LC micro-systems. Based on the ADE-FDTD method incorporating the equation of motion of the macroscopic polarization and the rate equations at the four level energy structures, we have successfully reproduced circularly polarized lasing from CLC at the edge energy of the stop band. It has also been clarified that the introduction of the defect is effective to lower the lasing threshold. Our technique can be utilized to design the CLC laser devise architecture for much lowered lasing threshold. The PNJ from LC micro-systems are uniquely polarized reflecting birefringence of LCs, which cannot be obtained using optically isotropic microdroplets or microcylinders. A small degree of birefringence drastically changes the optical characteristics of the obtained PNJ. Our findings may open the way for the development of the novel optical functional materials and devices.

Paper Details

Date Published: 7 March 2014
PDF: 7 pages
Proc. SPIE 8983, Organic Photonic Materials and Devices XVI, 89830P (7 March 2014); doi: 10.1117/12.2038271
Show Author Affiliations
Tatsunosuke Matsui, Mie Univ. (Japan)
Masahiro Kitaguchi, Mie Univ. (Japan)
Akiko Okajima, Mie Univ. (Japan)


Published in SPIE Proceedings Vol. 8983:
Organic Photonic Materials and Devices XVI
Christopher E. Tabor; François Kajzar; Toshikuni Kaino; Yasuhiro Koike, Editor(s)

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