Electric Field-Driven Shifting and Expansion of Photonic Band Gaps in 3D Liquid Photonic Crystals

被引:67
作者
Chen, Chun-Wei [1 ]
Li, Cheng-Chang [1 ]
Jau, Hung-Chang [1 ]
Yu, Lu-Chun [1 ]
Hong, Ching-Lang [1 ]
Guo, Duan-Yi [1 ]
Wang, Chun-Ta [1 ]
Lin, Tsung-Hsien [1 ]
机构
[1] Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung 80424, Taiwan
关键词
photonic crystal; liquid crystal; blue phase; band-gap modulation; CHOLESTERIC BLUE PHASES; 3-DIMENSIONAL NANOSTRUCTURES; DIELECTRIC ANISOTROPY; COLLOIDAL CRYSTALS; REFRACTIVE-INDEX; KOSSEL DIAGRAMS; COLOR; ELECTROSTRICTION; EMISSION; LASER;
D O I
10.1021/acsphotonics.5b00314
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Highly tunable 3D liquid photonic crystals are demonstrated using low-dc-field-driven polymer-stabilized blue-phase liquid crystals. The central wavelength of the photonic band gap can be reversibly shifted to more than 200 nm away from the original position. Besides, by controlling the polymerization-induced morphology variations, the band gap can also be expanded from a bandwidth of around 30 nm to at least 310 nm, the first time a "white" blue phase is observed. Both types of band-gap modulation, namely, shifting and expansion, can be independently manipulated in any crystal axis without affecting the lattice spacings in the other dimensions. We envision polymer-stabilized blue-phase liquid crystals as a fascinating platform for photonic applications, such as 3D lasers, nonlinear optics, and photonic integrated circuits.
引用
收藏
页码:1524 / 1531
页数:8
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