三轴应变光子晶体中的本征径向朗道彩虹
Intrinsic Radial Landau Rainbow in Triaxial Strained Photonic Crystal
浏览论文内容
中文总结 AI 辅助
本研究在三轴应变光子晶体中通过赝磁场与赝电场解除光子朗道能级简并，实现径向朗道彩虹，为空间有序朗道能级共振提供了新途径。
中文摘要 AI 辅助
局域共振对于增强光与物质相互作用、控制发射以及实现紧凑型光学谐振器和激光器至关重要。朗道能级提供了一种通过合成磁场组织光子态的独特途径，但其高简并度无法定义光谱分离的局域共振。本文中，我们报告了三轴应变光子晶体中光子朗道能级简并度的本征解除，导致本征径向朗道彩虹的出现。三轴形变通过应变诱导的赝磁场产生光子朗道能级，同时伴随的赝电场解除了朗道能级的简并度。结果，每个朗道能级分裂成等间距频率梯的局域共振。在零阶朗道能级中，这些模式表现出强度最大值，从器件中心逐渐向外移动，建立了径向频率位置映射和朗道彩虹。我们的结果揭示了三轴应变光子晶体中光子朗道能级的本征精细结构，并为空间有序的朗道能级共振提供了途径。
英文摘要
Localized resonances are essential for enhancing light matter interaction, controlling emission, and realizing compact optical resonators and lasers. Landau levels offer a distinct route to organizing photonic states through synthetic magnetic fields, but their high degeneracy does not define spectrally separated localized resonances. Here, we report the intrinsic lifting of degeneracy in photonic Landau levels in a triaxially strained photonic crystal, leading to the emergence of an intrinsic radial Landau rainbow. The triaxial deformation generates photonic Landau levels through a strain induced pseudomagnetic field, while an accompanying pseudoelectric field lifts the degeneracy of the Landau levels. As a result, each Landau level splits into an equally spaced frequency ladder of localized resonances. In zeroth Landau level, these modes exhibit intensity maxima that move progressively outward from the device center, establishing a radial frequency position mapping and Landau rainbow. Our results reveal an intrinsic fine structure of photonic Landau levels in a triaxial strained photonic crystal and provide a route to spatially ordered Landau level resonances.
