title: Low-threshold two-dimensional annular Bragg lasers.
abstract: Lasing at telecommunication wavelengths from annular resonators employing radial Bragg reflectors is demonstrated at room temperature under pulsed optical pumping. Submilliwatt pump threshold levels are observed for resonators with 0.5-1.5-wavelength-wide defects of radii 7-8 microm. The quality factors of the resonator modal fields are estimated to be of the order of a few thousand. The electromagnetic field is shown to be guided by the defect. Good agreement is found between the measured and the calculated spectra.
authors.affiliation: Department of Applied Physics, Mail Stop 128-95, California Institute of Technology, Pasadena, California 91125, USA. koby@caltech.edu
authors.forename: Jacob
authors.initials: J
authors.lastname: Scheuer
authors.forename: William M J
authors.initials: WM
authors.lastname: Green
authors.forename: Guy
authors.initials: G
authors.lastname: DeRose
authors.forename: Amnon
authors.initials: A
authors.lastname: Yariv