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Directional Laser from Solution-Grown Grating-Patterned Perovskite Single-Crystal Microdisks.

Zemin Zhang1,2, Florian Vogelbacher1, Jianbo De3

  • 1Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Angewandte Chemie (International Ed. in English)
|June 13, 2022
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Summary

Surface-patterned perovskite microdisk lasers offer improved light collection efficiency. This breakthrough enhances their potential for integrated optical circuits by directing laser emission.

Keywords:
Crystal GrowthDirectional LaserImprintingNanostructuresPerovskite Microdisk

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Area of Science:

  • Nanophotonics
  • Materials Science
  • Optoelectronics

Background:

  • Perovskite single-crystal microdisk (PVKsc-MD) lasers are promising coherent light sources.
  • Their symmetrical cavity causes multi-directional emission, reducing light collection efficiency for integrated optics.

Purpose of the Study:

  • To develop surface-patterned PVKsc-MDs for enhanced light collection efficiency.
  • To improve the directionality of perovskite microdisk lasers for practical applications.

Main Methods:

  • Synthesized MAPbBr3 PVKsc-MDs using a cost-efficient bottom-up solution process.
  • Employed spin-coating and confined-growth nanoimprinting to create surface patterns and nano-gratings.
  • Characterized crystal quality, shape, edges, and optical properties of the patterned microdisks.

Main Results:

  • Achieved high crystal quality, regular shape, and sharp edges in patterned microdisks.
  • Demonstrated low lasing thresholds and high quality (Q) factors in the surface-patterned PVKsc-MD lasers.
  • Improved emission directionality by four times due to the grating structure reducing cavity symmetry.

Conclusions:

  • Surface-patterned PVKsc-MDs offer a viable solution for efficient light extraction in nanophotonic devices.
  • The developed method provides a straightforward route to high-performance, directionally-emitting perovskite lasers.
  • These lasers show significant potential for advanced integrated optical circuits.