Coupling an epitaxial quantum dot to a fiber-based external-mirror microcavity

Details Coupling an epitaxial quantum dot to a fiber-based external-mirror microcavity Coupling an epitaxial quantum dot to a fiber-based external-mirror microcavity

2009-10-24

arxiv.org/abs/0910.4658v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report the coupling of individual InAs quantum dots (QDs) to an external-mirror microcavity. The external mirror is bonded to a fiber and positioned above a semiconductor sample consisting of a QD-containing GaAs layer on top of a distributed Bragg reflector (DBR). This open cavity can be rapidly tuned with a piezoelectric actuator without negatively affecting the QD linewidth. A mirror radius of curvature of 42 microns and a cavity length of 10 microns enable good mode-matching and thus high collection efficiency directly into the fiber. With an improved finesse this system may enter the strong coupling regime.

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