Perovskite random lasers on fiber facet

Abstract

Hybrid lead halide perovskites have made great strides in next-generation photovoltaic and optoelectronic devices. Random lasers based on perovskite materials have been intensively investigated, but the miniaturization of perovskite random lasers has not been achieved up to now. Here, we report the fabrication of perovskite random lasers based on perovskite films deposited on the optical fiber facets using a dip-coating method. Under optical pumping conditions, random lasing was observed with minimum threshold energy of 32.3 μJ/cm2 at ~550 nm; also, the lasing threshold decreased with increasing diameter of the optical fiber. The results show that the random lasing emission originates from the scattering between the perovskite crystal grains, and the decreased threshold is attributed to the increased active area of the perovskite film. The directionality of perovskite random lasers indicates that the divergence angle of the laser beam is less than 60°. We also demonstrate that the perovskite random laser on the fiber facet can prevent speckle formation and improve image quality. These results may promote the applications of random lasers in compact sources and integrated optoelectronic devices.

Fiber Optofluidic Microlasers: Structures, Characteristics, and Applications

“…The perovskite crystal grains in the film serve as both scatterers and gain medium for random lasing. [9] Both the MOFs and optical micro/nanofibers are attractive to support random lasing. For example, the micro-or nano-pores in the MOFs can be used as the scatterers for optical feedback.…”

“…The perovskite crystal grains in the film serve as both scatterers and gain medium for random lasing. [ 9 ]…”

“…Many types of materials, from laser dyes, luminescent nanomaterials like quantum dots (QDs), perovskite materials, to bioluminescent materials such as fluorescent proteins can be employed as gain medium. [5][6][7][8][9][10] Several typical FOFLs are schematically shown in Figure 1b. Not only for lasing, but FOFLs are also more valuable for biochemical sensing.…”

Study of laser actions by bird’s feathers with photonic crystals

“…Random lasers (RLs) have attracted great attention during the past two decays because of their cost-effective and simple manufacturing process, free-angle emission, high radiance, and low spatial coherence, etc. The property of bright illuminations with low spatial coherence leads RLs to reach a significant achievement in imaging and display applications 1 – 6 . Except for lightning and imaging, RLs can also be used in optical sensors and optoelectronic devices 6 – 10 .…”

Study of Laser Actions by Bird’s Feathers With Photonic Crystals

“…Random lasers (RLs) have attracted great attention during the past two decays because of their costeffective and simple manufacturing process, free-angle emission, high radiance, and low spatial coherence, etc. The property of bright illuminations with low spatial coherence leads RLs to reach a signi cant achievement in imaging and display applications [1][2][3]. Except for lightning and imaging, RLs can also be used in optical sensors and optoelectronic devices [4][5][6][7].…”