2008/10/15 by Q. Song, Qinghai Song, Hui Cao +4
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Photonic Crystals and Applications #Photonic and Optical Devices #physics.optics
paper · pdf · doi:10.1063/1.3081106
12pages 4figures
arxiv created 2008/10/15 · openalex publication_date 2009/02/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.