Giant Rabi Splitting of Whispering Gallery Polaritons in GaN/InGaN Core-Shell Wire

Su-Hyun Gong, Suk Min Ko, Min Ho Jang, Yong Hoon Cho

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


The hybrid nature of exciton polaritons opens up possibilities for developing a new concept nonlinear photonic device (e.g., polariton condensation, switching, and transistor) with great potential for controllability. Here, we proposed a novel type of polariton system resulting from strong coupling between a two-dimensional exciton and whispering gallery mode photon using a core-shell GaN/InGaN hexagonal wire. High quality, nonpolar InGaN multiple-quantum wells (MQWs) were conformally formed on a GaN core nanowire, which was spatially well matched with whispering gallery modes inside the wire. Both high longitudinal-transverse splitting of nonpolar MQWs and high spatial overlap with whispering gallery modes lead to unprecedented large Rabi splitting energy of 180 meV. This structure provides a robust polariton effect with a small footprint; thus, it could be utilized for a wide range of interesting applications.

Original languageEnglish
Pages (from-to)4517-4524
Number of pages8
JournalNano Letters
Issue number7
Publication statusPublished - 2015 Jul 8
Externally publishedYes


  • core'shell wire
  • Exciton polariton
  • microcavity
  • Rabi splitting
  • strong coupling
  • whispering gallery mode

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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