Abstract
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 language | English (US) |
---|---|
Article number | 061109 |
Journal | Applied Physics Letters |
Volume | 94 |
Issue number | 6 |
DOIs | |
State | Published - 2009 |
Funding
This work is supported partly by NIST under the Grant No. 70NANB6H6162 and by NSF under the Grant No. ECCS-0823345.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)