Next Article in Journal
TDPAC Studies of Local Defects and Phenomena in Ferroics and Multiferroics
Previous Article in Journal
Amplified Spontaneous Emission and Optical Gain in Organic Single Crystal Quinquethiophene
Previous Article in Special Issue
Photomechanical Azobenzene Crystals
Open AccessReview

Photochemical On–Off Switching of One-Dimensional Photonic Crystals Consisting of Azo-Functionalized Liquid Crystal Polymer and Polyvinyl Alcohol

Department of Materials Science and Applied Chemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
*
Authors to whom correspondence should be addressed.
Crystals 2019, 9(12), 610; https://doi.org/10.3390/cryst9120610
Received: 1 October 2019 / Revised: 14 November 2019 / Accepted: 16 November 2019 / Published: 21 November 2019
(This article belongs to the Special Issue Recent Progress in Photoresponsive Azopolymers)
One-dimensional (1D) photonic crystals (PCs) are prepared from multi-bilayered films stacked with alternating azo-functionalized liquid crystal polymer (PAz) films and polyvinyl alcohol (PVA) films. Reflection with a wavelength that depends on the thickness of the films is observed, and the reflection can be turned on and off by switching between the two states, based on whether there is a difference in the refractive index between the two films. The refractive index change of PAz can be photochemically caused by a phase transition, based on the alignment states of the liquid crystal (LC). In this review, we focused on an effective photo-induced on–off switching approach in 1D PCs using LC properties and described the basic optical and chemical principles, the experimental results, and further optimizations. View Full-Text
Keywords: photonic crystal; azobenzene; liquid crystal; multilayered film; molecular orientation; photochemical switching; refractive index photonic crystal; azobenzene; liquid crystal; multilayered film; molecular orientation; photochemical switching; refractive index
Show Figures

Figure 1

MDPI and ACS Style

Kim, S.; Kurihara, S. Photochemical On–Off Switching of One-Dimensional Photonic Crystals Consisting of Azo-Functionalized Liquid Crystal Polymer and Polyvinyl Alcohol. Crystals 2019, 9, 610.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop