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.
@article{arxiv.0910.4658,
title = {Coupling an epitaxial quantum dot to a fiber-based external-mirror microcavity},
author = {Andreas Muller and Edward B. Flagg and Michael Metcalfe and John Lawall and Glenn S. Solomon},
journal= {arXiv preprint arXiv:0910.4658},
year = {2015}
}