学术报告
报告题目: Tunable Optical Diffractive Structures from Liquid Crystalline Elastomers
报告人: Irena Drevenšek-Olenik
Faculty of Mathematics and Physics
University of Ljubljana and J. Stefan Institute
Ljubljana, Slovenia
时间：7月19日10:00
地点：泰达应用物理学院四楼报告厅
邀请人：张心正教授
Abstract: Adding a small amount of photo-isomerizable derivative to the matrix of a liquid-crystalline elastomer (LCE) opens up various possibilities for optical manipulation of mechanical, thermal, electrical and also optical properties of the material. Due to collective response of the medium to the trans-to-cis photo-isomerization process, illumination-induced modifications of optical refractive index in light-sensitive LCEs are several orders of magnitude larger than in conventional light-sensitive elastomers. Micro-patterning of LCEs consequently provides a very convenient method for fabrication of tunable diffractive optical elements (DOEs) that can be manipulated by various external stimuli. Some unusual characteristics of such DOEs that appear due to intriguing fundamental properties of the LCE materials will be presented.
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