Mode controlled near-infrared laser action made with the composites of solution processed lead halide perovskite and dielectric nanospheres
Packiyaraj Perumal1,2*, Yang-Fang Chen1, Min-Hsiung Shih3
1Department of Physics, National Taiwan University, Taipei, Taiwan
2Institute of Physics, Academia Sinica, Taipei, Taiwan
3Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan
* presenting author:Packiyaraj Perumal,
Mode controlled room-temperature near-infrared (NIR) laser action in inorganic-organic perovskite semiconductors coupled with SiO2nanospheres has been demonstrated. The spherical nanocavities of SiO2 nanospheres serve as laser resonators, and the laser oscillation was achieved through the coupling of whispering gallery mode (WGM) with perovskite gain material. It is found that the lasing spectra can be well manipulated by the size of SiO2 nanospheres. Three-dimensional finite-element method simulation was performed to understand the lasing modes. The underlying origin of the laser with large-scale, highly intensed, controllable wavelength, narrow-linewidth (<1.5 nm) mode resonances can be realized in terms of the waveguiding and scattering media within the nanosphere network.The discovered laser action and inherent chemical stability of perovskites not only render them significant practical use in various optoelectronic devices, but also provide a potential extension towards highly efficient NIR emitting devices for laser photonics, solid-state lighting and display applications. These unique features manifest an enhanced WGM laser action with mode-controlled behavior. In general, our approach could be extended to many other composites consisting of nanoparticles and light-emitting materials. It therefore can open up a new route for the creation of highly efficient optoelectronic devices for both optical and electrical pumping.

Keywords: Nanosphere, Perovskite, Organic-inorganic, Laser