Replica Symmetry Breaking in Cholesteric Liquid Crystal Bandgap Lasing,Annalen Der Physik

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Replica Symmetry Breaking in Cholesteric Liquid Crystal Bandgap Lasing
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-02-08 , DOI: 10.1002/andp.202000328
Jinyuan Kong ₁ , Jijun He ₂ , Junxi Zhang ₁ , Jiajun Ma ₃ , Kang Xie ₄ , Jingjing Chen ₁ , Liang Hong ₅ , Zhijia Hu _{1,

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Affiliation

Spin glass theory is an interdisciplinary statistical theory that has been widely used to describe the complex physical systems in diverse fields. In photonic platforms, the characteristic phenomenon of the phase transition between paramagnetic and spin glass state, i.e., replica symmetry breaking (RSB), has been recently observed in random laser (RL) systems via analogies between optical modes and magnetic spins. Here, the RSB phenomenon in cholesteric liquid crystal (CLC) bandgap lasing is reported. The CLC lasing arises from the edge of bandgap when the reflection spectrum edge of CLC spectrally overlaps with the fluorescence spectrum of dye. Different from the RL systems, where the RSB phenomenon is frequently observed, bandgap laser shows weak disorder due to its self‐assembled helical structure. Unexpectedly, based on the statistical study of the lasing spectra, the RSB can still be found when the bandgap laser operates at the threshold point. This RSB phenomenon is robust when the bandgap laser works at different temperatures and wavelengths. These results extend the scope of the feasibility of the spin glass theory in the photonic field, which boost the understanding of the interplay between system disorder and lasing statistical behavior.

中文翻译：

胆甾型液晶带隙激光的复制对称性破坏

自旋玻璃理论是一种跨学科的统计理论，已被广泛用于描述不同领域中的复杂物理系统。在光子平台中，最近已经通过光学模式和磁自旋之间的类比在随机激光（RL）系统中观察到顺磁性和自旋玻璃状态之间的相变的特征现象，即复制对称断裂（RSB）。在此，报道了胆甾型液晶（CLC）带隙激射中的RSB现象。当CLC的反射光谱边缘与染料的荧光光谱在光谱上重叠时，CLC激射是由带隙的边缘引起的。与经常观察到RSB现象的RL系统不同，带隙激光由于其自组装的螺旋结构而显示出较弱的无序性。不料，根据对激射光谱的统计研究，当带隙激光器在阈值点工作时，仍然可以找到RSB。当带隙激光器在不同的温度和波长下工作时，这种RSB现象很明显。这些结果扩展了自旋玻璃理论在光子领域中的可行性范围，从而加深了对系统无序与激光统计行为之间相互作用的理解。

更新日期：2021-03-11

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