Efficient waveguide-coupling of metal-clad nanolaser cavities

Myung Ki Kim, Amit M. Lakhani, Ming C. Wu

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)


Many remarkable semiconductor-based nanolaser cavities using metal have been reported in past few years. However, the efficient coupling of these small cavities to waveguides still remains a large challenge. Here, we show highly efficient coupling of a semiconductor-based metal-clad nanolaser cavity operating in the fundamental dielectric cavity mode to a silicon-on-insulator waveguide. By engineering the effective refractive index and the field distribution of the cavity mode, a coupling efficiency as high as 78% can be achieved for a metal-clad nanolaser with a modal volume of 0.28 (λ/n)3 while maintaining a high optical quality factor of < 600.

Original languageEnglish
Pages (from-to)23504-23512
Number of pages9
JournalOptics Express
Issue number23
Publication statusPublished - 2011 Nov 7
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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