Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics · 2010 · 16 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceOpticsOptoelectronicsPhotonicsOptical ResonatorsOptical SourcesPhotonic MaterialsQuantum ConfinementQuantum DotsSemiconductor LasersPumpingQuality FactorsQuantum Dot LasersQuantum Dot MaterialsSemiconductor Quantum DotsWet Oxidation
Abstract Whispering‐gallery‐mode (WGM) GaInP micro‐disc (MD) and micro‐ring (MR) resonators (diameters D=1‐3 mm, quality factors Q up to 5×10 3 ) with embedded InP quantum dots (size/density ∼100 nm/∼10 9 cm ‐2 , emission range 720‐770 nm) have been fabricated using a wet oxidation technique. Ultralow (sub‐nanoWatt) lasing thresholds for a single InP quantum dot have been demonstrated for these resonators at 15 K under optical pumping. Observed thresholds are two orders of magnitude lower than for single InAs QD lasing (M. Nomura et al., Opt. Express 17 , 15975 (2009) [1]). (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)