Phase-change perovskite tunable microlaser
Abstract
Since the invention of the laser, adoption of new gain media and device architectures has provided solutions to a variety of applications requiring specific power, size, spectral, spatial, and temporal tunability. Here we introduce a fundamentally new type of tunable semiconductor laser based on a phase-change perovskite metasurface that acts simultaneously as gain medium and optical cavity. As a proof of principle demonstration, we fabricate a subwavelength-thin perovskite metasurface supporting bound states in the continuum (BICs). Upon the perovskite structural phase transitions, both its refractive index and gain vary substantially, inducing fast (1.35 nm/K rate) and broad spectral tunability (>15 nm in the near-infrared), deterministic spatial mode hopping between polarization vortexes, and hysteretic optical bistability of the microlaser. These features highlight the uniqueness of phase-change perovskite tunable lasers, which may find wide applications in compact and low-cost optical multiplexers, sensors, memories, and LIDARs.
Cite
@article{arxiv.2107.05239,
title = {Phase-change perovskite tunable microlaser},
author = {Jingyi Tian and Giorgio Adamo and Hailong Liu and Mengfei Wu and Maciej Klein and Jie Deng and Norman Soo Seng Ang and Ramón Paniagua-Domínguez and Hong Liu and Arseniy I. Kuznetsov and Cesare Soci},
journal= {arXiv preprint arXiv:2107.05239},
year = {2021}
}