Templated Sphere Phase Liquid Crystals for Tunable Random Lasing.

Templated Sphere Phase Liquid Crystals for Tunable Random Lasing.
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用于可调谐随机激光发射的模板化球相液晶

DOI:
10.3390/nano7110392
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发表时间:
2017-11-15
期刊:
Nanomaterials (Basel, Switzerland)
影响因子:
--
通讯作者:
Lu J
Lu J
中科院分区:
其他
文献类型:
--
作者:
Chen Z;Hu D;Chen X;Zeng D;Lee Y;Chen X;Lu J

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在很窄的温度范围内,各向同性相和蓝相之间存在着一种由三维扭曲结构组成的球状相液晶(SPLC),温度约为几摄氏度。采用低浓度的聚合物模板来改善SPLC的热稳定性,并将温度范围扩大到448K以上,通过模板处理,实现了掺染料SPLC的波长可调随机激光。在不同聚合物浓度下,通过电场调制,重构的SPLC随机激光可以实现40 nm以上波长的连续漂移。
A sphere phase liquid crystal (SPLC) composed of three-dimensional twist structures with disclinations among them exists between isotropic phase and blue phase in a very narrow temperature range, about several degrees centigrade. A low concentration polymer template is applied to improve the thermal stability of SPLCs and broadens the temperature range to more than 448 K. By template processing, a wavelength tunable random lasing is demonstrated with dye doped SPLC. With different polymer concentrations, the reconstructed SPLC random lasing may achieve more than 40 nm wavelength continuous shifting by electric field modulation.
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