Fabrication of multi-dimensional anisotropic photonic devices by polarization interference method using photoalignment technique of liquid crystals

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289097
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Ono Hiroshi 長岡技術科学大学, 工学(系)研究科(研究院), 教授 (10283029)
• Co-Investigator(Kenkyū-buntansha): KAWATSUKI Nobuhiro 兵庫県立大学, 物質系工学専攻, 教授 (60271201)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 液晶 / 回折格子 / 偏光 / 光配向 / 光反応性高分子液晶 / 光回折 / 光機能性高分子 / 分子配向

Outline of Final Research Achievements

We propose the efficient yet practical method for fabricating the LC gratings using polarization holographic exposure and photocrosslinkable polymer LC (PCLC) synthesized by us.The in-plane alignment direction of PCLC can be controlled depending on the exposure energy of linearly polarized ultraviolet light in the photoalignment process. By applying this alignment property, various LC gratings with 90°twisted nematic (TN) alignment and 0°planar alignment can be fabricated by simultaneously irradiating an empty glass cell composed of two PCLC films with a polarized interference beam. These resultant LC gratings have various attractive polarization diffraction properties.
This study is of great significance because different two-dimensional continuous and complex alignment patterns can be produced on two alignment films by simultaneously irradiating an empty glass cell composed of two unaligned PCLC films with three- and four- beam polarized interference beam.

Free Research Field

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