气候变化领域集成服务门户(CCPortal): Optical vector field rotation and switching with near-unity transmission by fully developed chiral photonic crystals

CCPortal

DOI	10.1073/pnas.2021304118
	Optical vector field rotation and switching with near-unity transmission by fully developed chiral photonic crystals
	Chen C.-W.; Khoo I.C.
发表日期	2021
ISSN	00278424
卷号	118 期号:16
英文摘要	State-of-the-art nanostructured chiral photonic crystals (CPCs), metamaterials, and metasurfaces have shown giant optical rotatory power but are generally passive and beset with large optical losses and with inadequate performance due to limited size/interaction length and narrow operation bandwidth. In this work, we demonstrate by detailed theoretical modeling and experiments that a fully developed CPC, one for which the number of unit cells N is high enough that it acquires the full potentials of an ideal (N → ∞) crystal, will overcome the aforementioned limitations, leading to a new generation of versatile high-performance polarization manipulation optics. Such high-N CPCs are realized by field-assisted self-assembly of cholesteric liquid crystals to unprecedented thicknesses not possible with any other means. Characterization studies show that high-N CPCs exhibit broad transmission maxima accompanied by giant rotatory power, thereby enabling large (>π) polarization rotation with near-unity transmission over a large operation bandwidth. Polarization rotation is demonstrated to be independent of input polarization orientation and applies equally well on continuous-wave or ultrafast (picosecond to femtosecond) pulsed lasers of simple or complex (radial, azimuthal) vector fields. Liquid crystal-based CPCs also allow very wide tuning of the operation spectral range and dynamic polarization switching and control possibilities by virtue of several stimuli-induced index or birefringence changing mechanisms. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Chiral photonic crystal; Laser vector field; Liquid crystal; Polarization rotation
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179811
作者单位	Department of Electrical Engineering, School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, PA 16802, United States
推荐引用方式 GB/T 7714	Chen C.-W.,Khoo I.C.. Optical vector field rotation and switching with near-unity transmission by fully developed chiral photonic crystals[J],2021,118(16).
APA	Chen C.-W.,&Khoo I.C..(2021).Optical vector field rotation and switching with near-unity transmission by fully developed chiral photonic crystals.Proceedings of the National Academy of Sciences of the United States of America,118(16).
MLA	Chen C.-W.,et al."Optical vector field rotation and switching with near-unity transmission by fully developed chiral photonic crystals".Proceedings of the National Academy of Sciences of the United States of America 118.16(2021).