A perovskite microlaser is potentially valuable for integrated photonics due to its excellent properties. The artificial microlasers were mostly made on polycrystalline films. Though a perovskite single crystal has significantly improved properties in comparison with its polycrystalline counterpart, an artificial microlaser based on single-crystal perovskite has been much less explored due to the difficulty in producing an ultrathin-single-crystal (UTSC) film. Here we show a device processing based on a perovskite UTSC film, confirming the high performance of the UTSC device with a quality factor of 1250. The single-crystal device shows 4.5 times the quality factor and 8 times the radiation intensity in comparison with its polycrystalline counterpart. The experiment first proved that hybrid perovskite microlasers with a subwavelength fine structure can be processed by focused ion beams (FIB). In addition, a wavelength-tunable distributed feedback (DFB) laser is demonstrated, with a tuning range of ∼4.6 nm. The research provides an easily applicable approach for perovskite photonic devices with excellent performance.
The on-chip integrated visible microlaser is a core unit of high-speed visible-light communication with huge bandwidth resources , which needs robustness against fabrication errors, compressible linewidth, reducible threshold, and in-plane emission . However, until now, it has been a great challenge to meet these requirements simultaneously. Here, we report a scalable strategy to realize a robust on-chip integrated visible microlaser with further improved lasing performances enabled by the increased orders ( n ) of exceptional surfaces, and experimentally verify the strategy by demonstrating the performances of a second-order exceptional surface–tailored microlaser. We further prove the potential application of the strategy by discussing an exceptional surface–tailored topological microlaser with unique performances. This work lays a foundation for further development of on-chip integrated high-speed visible-light communication and processing systems, provides a platform for the fundamental study of non-Hermitian photonics, and proposes a feasible method of joint research for non-Hermitian photonics with nonlinear optics and topological photonics.
With tunable wavelength and low lasing threshold, organo-lead perovskites have become promising candidates as lasing sources, such as microlasers for optical integration. It is essential to understand their lasing mechanism and control the lasing behavior at an ultrafast time scale. In this work, we prepared a series of square MAPbBr 3 single-crystalline microcavities with/without Bragg reflectors. The transient lasing mode behavior was found to be size-dependent, i.e., a stronger red shift and a slower decay occurred in larger microplates. This inevitable transient red shift reduces the mode quality of perovskite microlasers, which can be attributed to the electron−hole plasma decay at a high excitation density. For optimization, distributed Bragg reflectors (DBRs) were applied with successful suppression of the transient mode shift. This work provides systematic insight to understand the transient behaviors of perovskite lasing microcavities, which would guide the design of perovskite-based light sources for optical communication and integration.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.