Visible submicron microdisk lasers

The authors describe the performance of submicron microdisk lasers fabricated within InGaP∕InGaAlP quantum well material working at room temperature. The smallest lasers, with diameters of approximately 600nm, feature ultrasmall mode volumes and exhibit single mode operation at low threshold powers. Their small cavity volumes of approximately 0.03μm3 enable microdisk lasers to be used as spectroscopic sources. Here the authors demonstrate the fabrication and characterization of visible, monolithically fabricated, submicron microdisk lasers.