Lead halide perovskite vortex microlasers

• Published in: Nature communications Vol. 11; no. 1; pp. 4862 - 7
• Main Authors: Sun, Wenzhao, Liu, Yilin, Qu, Geyang, Fan, Yubin, Dai, Wei, Wang, Yuhan, Song, Qinghai, Han, Jiecai, Xiao, Shumin
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 25.09.2020; Nature Publishing Group; Nature Portfolio
• Subjects: 639/301/1019/1020; 639/301/357/404; Angular momentum; Glass substrates; Group III-V semiconductors; Humanities and Social Sciences; Integrated circuits; Laboratories; Laser beams; Lasers; Lead compounds; Linear polarization; Metal halides; Microlasers; multidisciplinary; Optical communication; Optoelectronics; Perovskites; Photonics; Plasma etching; Radiation; Science; Science (multidisciplinary); Semiconductors; Silicon nitride; Spectrum analysis; Topology; Vertical cavity surface emission lasers; Vortices; Wave fronts
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-020-18669-1

Lead halide perovskite microlasers have been very promising for versatile optoelectronic applications. However, most perovskite microlasers are linearly polarized with uniform wavefront. The structured laser beams carrying orbital angular momentum have rarely been studied and the applications of perovskites in next-generation optical communications are thus hindered. Herein, we experimentally demonstrate the perovskite vortex microlasers with highly directional outputs and well−controlled topological charges. High quality gratings have been experimentally fabricated in perovskite film and the subsequent vertical cavity surface emitting lasers (VCSELs) with divergent angles of 3 o are achieved. With the control of Archimedean spiral gratings, the wavefront of the perovskite VCSELs has been switched to be helical with topological charges of q  = −4 to 4. This research is able to expand the potential applications of perovskite microlasers in hybrid integrated photonic networks, as well as optical computing. Integration of III-V semiconductor microlasers into modern Si or Si3N4 based photonic integrated circuits remains a challenge. Here, the authors demonstrate a perovskite vortex microlaser with highly directional outputs and well-controlled topological charges that is highly compatible with most materials.