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最近几年,具有非圆对称边界形状的光学微腔,即非对称微腔,已经成为微纳光子学领域中的一个重要研究方向。非对称微腔打破了常规回音壁光学微腔的边界圆对称性,使得回音壁模式的辐射具有明显方向性,无需借助外部耦合器件即能有效地同环境交换能量,有望应用于制作集成光学器件和实现自由空间光互联。概要介绍了非对称微腔中的最新研究进展,包括高准直定向发射、高效的自由空间光激发、棘轮形非对称腔以及三维非对称腔4个研究方向,概述其基本原理并展望了未来的发展。
In recent years, optical microcavities with non-circular symmetrical boundary shapes, that is, asymmetric microcavities, have become an important research direction in the field of micro-nano-photonics. The asymmetric microcavity breaks the circular boundary symmetry of the conventional echo-wall optical microcavity so that the echo-wall mode radiation has obvious directionality, and can exchange energy with the environment effectively without the aid of an external coupling device, thereby being expected to be used in the fabrication of an integrated optical device And to achieve free space optical interconnection. The recent research progress in asymmetric microcavity is briefly introduced, including four directions: high collimated directional emission, efficient free-space photoexcitation, ratchet-shaped asymmetric cavity and three-dimensional asymmetric cavity. The basic principles and prospects of the future are outlined development of.