Lasing effect in blue phase liquid crystal

Lin, Tsung‐Hsien; Chen, Chun-Wei; Jau, Hung Chang; Lee, Chun Hong; Wang, Chun-Ta; Wu, Chih Wei; Huang, Huai Ping; Khoo, I. C.

doi:10.1117/12.2022738

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…While the BPLCs are macroscopic optically isotropic, disordered platelet domain boundaries giving rise to scattering of diffuse light. Scattering also arises from indices mismatch between polymer and LC in polymer-stabilized BPLCs [51]. Sphere phase (SP) is a phase of LC consisting of highly fluid self-assembly of LC molecules 3-DTSs induced by chiral dopant.…”

Section: Scatteringmentioning

confidence: 99%

Templated Twist Structure Liquid Crystals and Photonic Applications

Gao

Ding

2022

Polymers

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Twist structure liquid crystals (TSLCs) have attracted increasing attention in photonic applications due to their distinct properties: Bragg reflection, scattering, and optical rotation. However, there exist some issues due to the defects of TSLCs: weak thermal stability, narrow bandwidth, and complicated fabrication. In this review, we introduce the templating technique which includes device structure, templating process, and photonic properties of templated TSLCs to improve the issues. Furthermore, a variety of photonic applications including lasing, optical filters and gratings based on TSLCs with polymer templates are presented. Additionally, other applications of TSLCs are briefly introduced. Finally, the remaining challenges and future perspectives of templated TSLCs are proposed.

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Section: Scatteringmentioning

confidence: 99%

Templated Twist Structure Liquid Crystals and Photonic Applications

Gao

Ding

2022

Polymers

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“…On the other hand, after refilling an achiral nematic liquid crystal (LC) into the polymer template, the 3-D helical structure of BPLC can be reconstructed, and the thermal stability of the blue phase can be improved [18][19][20][21]. With good thermal stability, the BPLCs have attracted more interest for the applications in filter [22], display [23] and lasing [24] due to the sub-millisecond response time, macro optical isotropic status, and self-assembled photonic crystal structures on the order of visible wavelength. In this paper, a narrow bandwidth multi-wavelength filter is proposed based on templated BPLCs (T-BPLCs) in the visible band, which can realize multi-layer LC devices without the intermediate layer and reflect multiple wavelengths at the same time.…”

Section: Introductionmentioning

confidence: 99%

Multi-Wavelength Filters of Templated Blue Phase Liquid Crystal

et al. 2019

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The multi-wavelength filters in the visible light band using the blue phase liquid crystal (BPLC) template was investigated. A multi-layer templated BPLC (T-BPLC) filter without intermediate dielectric layers was fabricated, which may reflect multi-wavelength in one filter. Compared with the cholesteric liquid crystal (CLC) filter, the T-BPLC filter may get a much narrower reflection bandwidth (<15 nm), show better angular stability of incident light, and have a more stable wavelength and bandwidth with a temperature shift. Furthermore, the central wavelength and bandwidth can be easily controlled by the fabrication process and the optimization of the material concentration. When the incident angle varies, the shift of the center wavelength of the T-BPLC filter is much smaller than that of the CLC filter. The multi-wavelength filter shows a potential application in color filters and high-density wavelength division multiplexed networks.

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Polymer‐Stabilized Blue Phase Liquid Crystals for Photonic Applications

Huang

Zhou

et al. 2016

Adv Materials Technologies

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Polymer‐stabilized blue phase liquid crystal (PS‐BPLC) is emerging as a promising candidate for next‐generation photonic applications due to its attractive features: nano‐scale structure that enables sub‐millisecond response time, self‐assembly that eliminates the need for surface alignment, and three‐dimensional cubic structure so that it is quasi‐isotropic without applied field. Here, we will look into the photonic properties of PS‐BPLC microscopically and macroscopically, and will focus on the non‐display photonic applications based on these properties. First we will give a general introduction to the polymer stabilization process, general photonic properties, electric field effects and desirable electro‐optical properties of PS‐BPLC. Next we will present applications based on the microscopic photonic properties in the cubic structures with double twist cylinders: photonic band gap, scattering and unwinding of the double twist structure under electric field. Then, we will cover applications based on the macroscopic refractive index change of PS‐BPLC under electric fields, whose mechanisms are further classified into phase retardation, phase modulation, and resonance condition change. Finally we will look into the remaining challenges and future perspectives of PS‐BPLC for photonic applications.

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Lasing effect in blue phase liquid crystal

Cited by 3 publications

References 35 publications

Templated Twist Structure Liquid Crystals and Photonic Applications

Templated Twist Structure Liquid Crystals and Photonic Applications

Multi-Wavelength Filters of Templated Blue Phase Liquid Crystal

Polymer‐Stabilized Blue Phase Liquid Crystals for Photonic Applications

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