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Scanning electron micrograph of a diameter disk: (a) perspective view, (b) edge close-up view, and (c) top view.
(a) RT photoluminescence spectrum of bare QWs. (b) Multimode structure of a single . The typical mode linewidth is which corresponds to a quality factor .
(Color online) Optical microscope images of a under homogeneous (Gaussian beam) excitation: (a) below and (b) above lasing threshold.
(Color online) (a) Mode intensity plotted as a function of the peak power density demonstrating a laser threshold at . (b) emission line above threshold.
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