Shanghai Institute Of Optics And Fine Mechanics Successfully Prepared Single-Crystal All-Inorganic Perovskite CsPbBr₃ Microcavity

High temperature stable upconversion single mode lasing

Recently, the Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences has cooperated with Nanjing University of Aeronautics and Astronautics and the Institute of Semiconductors of the Chinese Academy of Sciences to successfully prepare a high-quality, low-threshold single-crystal all-inorganic perovskite CsPbBr₃ microcavity and obtain high temperature stability. Convert single mode lasing. This study provides new ideas for the integration of microcavities on optical sheets. Relevant research results have been published in the journal ACS Photonics.

Narrow linewidth, ultra-high quality single-mode nanolasers have many application potentials in physics and engineering, such as on-chip optical integration, coherent detection, and quantum information processing. The all-inorganic perovskite CsPbBr₃ semiconductor material has received extensive attention and research as a high-gain material. However, poor thermal stability has been the biggest problem limiting the material. At present, most perovskite microcavities can only be lasing at room temperature or even low temperature, which greatly limits the application of high power integrated optoelectronic devices and perovskite electric pump lasers. Therefore, improving the thermal stability of the perovskite microcavity to obtain a stable high quality factor single mode laser output is an urgent problem to be solved.

The single-crystal all-inorganic perovskite CsPbBr₃ microcavity prepared by the research team raised the working temperature of the perovskite microcavity to 440K for the first time , and at 440K , the 540nm up-conversion single-mode lasing was still obtained . The lasing capable1.4 relative intensity times the threshold power of the pump 1 is maintained 60 Zhong ( 7.2 × 10. ⁴ pumping the cycle). In addition, a single-mode lasing output with a quality factor of up to1.01 × 10 ⁴ can be obtained by two-photon pumping at 800 nm at room temperature . The research team also used 3D stereo simulation to analyze the complex modes in the cubic microcavity, and calculated that there are multiple sets of modes in the cubic microcavity. The results show that as the volume of the microcavity decreases, not only the number of sets of modes is reduced, but also the number of modes is reduced. When the final dimensions of the cube in the microcavity 1.7m m , the single mode laser output can be obtained. Relevant results were unanimously recognized by peer review.

The study was funded by the National Natural Science Foundation of China ( 61675219, 61875256, 61475173, 11474297, 11674343 ), the Chinese Academy of Sciences Youth Innovation Promotion Association, and the Shanghai Science and Technology Commission (No. 17ZR1444000).