Lead halide perovskite vortex microlasers

Wenzhao Sun,Shumin Xiao,Yubin Fan,Yuhan Wang,Yilin Liu,Jiecai Han,Qinghai Song,Geyang Qu,Wei Dai

doi:10.1038/s41467-020-18669-1

Abstract

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 3o 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.

Highlights

Lead halide perovskite microlasers have been very promising for versatile optoelectronic applications
The generation of on-chip integrated orbital angular momentum (OAM) microlasers has been recognized as an effective approach to address the exponentially growing demand for worldwide network capacity[8,9,10,11]
The lead halide perovskite film was deposited with the vapor assisted spin-coating technique[39]

Summary

Introduction

Lead halide perovskite microlasers have been very promising for versatile optoelectronic applications. The structured laser beams carrying orbital angular momentum have rarely been studied and the applications of perovskites in next-generation optical communications are hindered. We experimentally demonstrate the perovskite vortex microlasers with highly directional outputs and well−controlled topological charges. 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. Lead halide perovskites are compatible with many material types, including flexible substrates and metal electrodes[22,23,24]. This characteristic, associated with its high refractive index, allows a direct incorporation of a perovskite microlaser onto a Si3N4-based PIC.

Methods

Results

Conclusion