Topological photonics and vortex microlasers based on patterned perovskites

Metal halide perovskites have sparked tremendous research attention in the past decade, due to the excellent material properties and nontrivial device performance ranging from photovoltaics to optoelectronics. The development of material synthesis methods and nanofabrication techniques has endowed perovskites with various morphologies and diverse physical properties. Compared with the planar film, structured perovskites have proved to show prominent improvements in the device performance. Moreover, novel optical phenomena and devices have been proposed and demonstrated based on the patterned perovskites. In this chapter, we review the recent progress in the topological photonics and vertex microlasers based on patterned perovskites and conclude with challenges and perspectives.