Near-IR subwavelength microdisk lasers

Q. Song*, H. Cao, S. T. Ho, G. S. Solomon

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

102 Scopus citations


We report single-mode lasing in subwavelength GaAs disks under optical pumping. The disks are fabricated by standard photolithography and two steps of wet chemical etching. The simple fabrication method can produce submicron disks with good circularity, smooth boundary, and vertical sidewalls. The smallest lasing disks have a diameter of 627 nm and thickness of 265 nm. The ratio of the disk diameter to the vacuum lasing wavelength is about 0.7. Our numerical simulations confirm that the lasing modes are whispering-gallery modes with the azimuthal number as small as 4 and a modal volume of 0.97 (λ/n) 3.

Original languageEnglish (US)
Article number061109
JournalApplied Physics Letters
Issue number6
StatePublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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