Chang Zhiyu, Huang Rixing, Chen Ping, Li Guangyuan
Opt Express. 2025 Jun 16;33(12):26758-26770. doi: 10.1364/OE.564668.
We report spatiotemporally tunable mode coupling between Fabry-Pérot (F-P) resonances and dark or bright modes in the weak- or strong-coupling regime in an all-dielectric coupled system, which consists of an F-P microcavity formed by two distributed Bragg reflectors (DBR) and a metasurface made of periodic nanocavities. Simulation results show that F-P resonances can be tuned to be coupled to dark waveguide modes or a bright electric dipole Mie surface lattice resonance, depending on the microcavity height, and that the coupling strength can be manipulated between the weak- and strong-coupling regimes by varying the photon lifetime, or equivalently the quality factors (-factors) of F-P resonances, which can be realized by changing the number of DBR layers. We also show that the slow-light effect associated with the electromagnetically induced reflection-like window in the weak-coupling regime can also be regulated through the -factor. With all these findings, our study provides an alternative for manipulating light-matter interactions in coupled micro-/nano-cavities that are promising for various applications.
我们报道了在全介质耦合系统中，法布里-珀罗（F-P）共振与弱耦合或强耦合 regime 下的暗模式或亮模式之间的时空可调谐模式耦合，该系统由两个分布式布拉格反射器（DBR）形成的 F-P 微腔和由周期性纳米腔组成的超表面构成。模拟结果表明，根据微腔高度，F-P 共振可以被调谐为与暗波导模式或亮电偶极米氏表面晶格共振耦合，并且通过改变光子寿命，或者等效地改变 F-P 共振的品质因数（Q 因子），耦合强度可以在弱耦合和强耦合 regime 之间进行操纵，这可以通过改变 DBR 层的数量来实现。我们还表明，与弱耦合 regime 中电磁诱导的类似反射窗口相关的慢光效应也可以通过 Q 因子进行调节。基于所有这些发现，我们的研究为在耦合微/纳米腔中操纵光与物质相互作用提供了一种替代方案，这对于各种应用具有广阔前景。
