Selective Pump Focusing on Individual Laser Modes in Microcavities

Jae Hyuck Choi, Sehwan Chang, Kyoung Ho Kim, Wonjun Choi, Soon Jae Lee, Jung Min Lee, Min Soo Hwang, Jungkil Kim, Seungwon Jeong, Min Kyo Seo, Wonshik Choi, Hong Gyu Park

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We demonstrate selective pump focusing for highly isolated single-mode lasers in microdisk and microring cavities, and achieve lasing action from a microdisk cavity underneath a scattering medium. The spatial profile of the pumping light evolves by an iterative feedback process and is optimized to maximize the field overlap with a selected cavity mode. The high order of mode selectivity and high resolving power are obtained in a multimode cavity in the presence of significant modal overlaps. As a result of the adaptive optical pumping, we successfully achieve the efficient energy transfer to a microdisk underneath a random scattering medium and observe lasing action through the scattering medium. We believe that our selective pumping procedure will pave the way for the development of low-threshold, single-mode nanolasers embedded in various materials.

Original languageEnglish
Pages (from-to)2791-2798
Number of pages8
JournalACS Photonics
Issue number7
Publication statusPublished - 2018 Jul 18


  • energy transfer
  • laser beam shaping
  • scattering medium
  • semiconductor laser
  • single-mode laser

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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