论文标题
基于唯一和深度亚波长钙钛矿光栅的可调节强的等离子体脱落耦合
Tunable strong plasmon-exciton coupling based on borophene and deep subwavelength perovskite grating
论文作者
论文摘要
二维材料支持了深层限制和可调的等离子体模式，这些模式具有实现设备小型化和柔性操作的巨大潜力。在本文中，我们提出了一个由唯一层和钙钛矿光栅组成的衍射空系统，以研究唯一的唯一指南等离子体（BGP）和钙钛矿激子（PE）模式之间的强耦合。 BGP模式的共振能量可以进行电气调节以匹配PE模式的能量，并且在零细节条件下实现了巨大的RABI分裂。由于BGP模式提供的强场增强，因此分裂能量可以达到230 MEV。因此，通过动态操纵失谐来实现具有1.76π范围的主动反射相调制。此外，通过增加硼苯层和钙钛矿光栅之间的距离，可以通过消失的能量分裂观察到平均时间对称性破裂。我们的结果加深了对小波长尺度上光 - 物质相互作用的理解，并为设计活性等离子体设备提供了指南。
Two-dimensional materials support deeply confined and tunable plasmonic modes, which have great potential for achieving device miniaturization and flexible manipulation. In this paper, we propose a diffraction-unlimited system composed of borophene layer and perovskite grating to investigate the strong coupling between the borophene guiding plasmon (BGP) and perovskite exciton (PE) mode. The resonant energy of BGP mode could be electrically tuned to match the energy of PE mode, and a remarkable Rabi splitting is attained under zero-detuning condition. The splitting energy could reach 230 meV due to the strong field enhancement provided by BGP mode. Consequently, an active reflective phase modulation with 1.76π range is achieved by dynamically manipulating the detuning. Furthermore, by increasing the distance between the borophene layer and perovskite grating, a parity-time symmetry breaking could be observed with the vanished energy splitting. Our results deepen the understanding of light-matter interaction at the sub-wavelength scale and provide a guideline for designing active plasmonic devices.
