Patent ID: 8208502

Claim:
An optical device, comprising: a microcavity light emitter comprising a semiconductor quantum dot structure that absorbs excitation energy and emits laser light; a single-mode fiber comprising a thinned taper section between first and second single-mode fiber sections and being located near the microcavity light emitter in optical evanescent coupling with the microcavity light emitter to couple a portion of the laser light out of the microcavity light emitter into at least one of the first and second single-mode fiber sections as an output of the microcavity light emitter, the taper section having a refractive index significantly less than a refractive index of the semiconductor quantum dot structure; and a movable stage on which the microcavity light emitter is mounted, the movable stage being adjustable in position to control a position of the microcavity light emitter relative to be in optical evanescent coupling with the taper section, wherein the semiconductor quantum dot structure is structured and positioned by the movable stage relative to the taper section to effectuate a phase matching that overcomes a difference between refractive indices of the semiconductor quantum dot structure and the taper section of the single-mode fiber to provide efficient optical evanescent coupling between the tapered section and the semiconductor quantum dot structure, wherein the microcavity light emitter comprises a semiconductor structure comprising an array of photonic crystal cavities, and wherein the semiconductor quantum dot structure is embedded in an array of photonic crystal cavities, wherein the array of photonic crystal cavities has a spacing between adjacent photonic crystal cavities and a dimension of the photonic crystal cavities to provide the phase matching.