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

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• 作者：Chun-Wei Chen ; Cheng-Chang Li ; Hung-Chang Jau ; Lu-Chun Yu ; Ching-Lang Hong ; Duan-Yi Guo ; Chun-Ta Wang ; Tsung-Hsien Lin
• 刊名：ACS Photonics
• 出版年：2015
• 出版时间：November 18, 2015
• 年：2015
• 卷：2
• 期：11
• 页码：1524-1531
• 全文大小：762K
• ISSN：2330-4022

文摘

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 鈥渨hite鈥?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.