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ELOS 2021

Azodye nanolayers: Applications in E-paper and security films

Vladimir G Chigrinov, Speaker at Optics Conference
Hong Kong University of Science and Technology, Hong Kong
Title : Azodye nanolayers: Applications in E-paper and security films


Photoalignment and photopatterning has been proposed and studied for a long time. Light is responsible for the delivery of energy as well as phase and polarization information to materials systems. It was shown that photoalignment azodye materials could provide high quality alignment of molecules in a liquid crystal (LC) cell by nanolayers from 1 to 20 nm. Over the past years, a lot of improvements and variations of the photoalignment and photopatterning technology has been made for display and photonics applications. In particular, the application of this technology to active optical elements in optical signal processing and communications is currently a hot topic in photonics research.

Photoaligned optically rewritable (ORW) liquid crystal based on azodye nanolayers is made to write, store and rewrite again the information generated by computer on a glass or flexible carrier. Optically rewritable technique is highly desirable, as e-paper displays suffer from the high level complexity of driving electronic due to the insufficient durability of flexible conductor and contact bonding. The optical security film with high security features by using azodye photo-alignment technology were also implemented.  Azodye photo-alignment, which is a new technology for aligning liquid crystal, is being used to produce a flexible and highly recognized security film.


Professor Vladimir G. Chigrinov is an Expert in Flat Panel Technology in Russia, recognized by the World Technology Evaluation Centre, 1994, and SID Fellow since 2008. He is an author of 6 books, 25 reviews and book chapters, 320 journal papers, more than 656 Conference presentations, and 35 US patents in the field of liquid crystals since 1974. He got Excellent Research Award of HKUST School of Engineering in 2012. He is a Member of EU Academy of Sciences (EUAS) since July 2017. He got A Slottow Owaki Prize of SID in 2018. He is 2019 Distinguished Fellow of International Engineering and Technology Institute. Since 2018 he works as Professor in the School of Physics and Optoelectronics Engineering in Foshan University, Foshan, China. 2020-2024 Vice President of Fellow of Institute of Data Science and Artificial Intelligence (IDSAI) Since 2021 distinguished Fellow of Institute of Data Science and Artificial Intelligence.