Vortex nanolaser based on a photonic disclination cavity

Min Soo Hwang, Ha Reem Kim, Jungkil Kim, Bohm Jung Yang, Yuri Kivshar, Hong Gyu Park

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Optical vector vortex beams provide additional degrees of freedom for spatially distinguishable channels in data transmission. Although several coherent light sources carrying a topological singularity have been reported, it remains challenging to develop a general strategy for designing ultra-small, high-quality photonic nanocavities that generate and support optical vortex modes. Here we demonstrate wavelength-scale, low-threshold, vortex and anti-vortex nanolasers in a C5 symmetric optical cavity formed by a topological disclination. Various photonic disclination cavities are designed and analysed using the similarities between tight-binding models and optical simulations. Unique resonant modes are strongly confined in these cavities, which exhibit wavelength-scale mode volumes and retain topological charges in the disclination geometries. In the experiment, the optical vortices of the lasing modes are clearly identified by measuring polarization-resolved images, Stokes parameters and self-interference patterns. Demonstration of vortex nanolasers using our facile design procedure will pave the way towards next-generation optical communication systems.

Original languageEnglish
Pages (from-to)286-293
Number of pages8
JournalNature Photonics
Volume18
Issue number3
DOIs
Publication statusPublished - 2024 Mar
Externally publishedYes

Bibliographical note

Publisher Copyright:
© The Author(s) 2023.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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