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Lead halide perovskite vortex microlasers.

Wenzhao Sun1, Yilin Liu1, Geyang Qu1

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This summary is machine-generated.

Researchers developed perovskite vortex microlasers, creating structured laser beams with orbital angular momentum. This breakthrough advances perovskite applications in optical communications and computing.

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Area of Science:

  • Optoelectronics
  • Photonics
  • Materials Science

Background:

  • Perovskite microlasers show promise for optoelectronics but typically produce linearly polarized, uniform wavefronts.
  • The lack of structured laser beams with orbital angular momentum in perovskite microlasers limits their use in advanced optical communications.

Purpose of the Study:

  • To experimentally demonstrate perovskite vortex microlasers capable of producing structured laser beams.
  • To enable control over topological charges and wavefronts for enhanced optical functionalities.

Main Methods:

  • Fabrication of high-quality gratings in perovskite films.
  • Development of vertical cavity surface-emitting lasers (VCSELs) with controlled divergence angles.
  • Utilizing Archimedean spiral gratings to sculpt the laser wavefront.

Main Results:

  • Achieved highly directional perovskite vortex microlasers.
  • Demonstrated control over topological charges, ranging from q = -4 to 4.
  • Successfully switched the wavefront of perovskite VCSELs to a helical structure.

Conclusions:

  • This work expands the application scope of perovskite microlasers.
  • The developed perovskite vortex microlasers hold potential for hybrid integrated photonic networks and optical computing.