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



Andreas Muller, Edward B. Flagg, Michael Metcalfe, John R. Lawall, Glenn S. Solomon


We report the coupling of individual InAs quantum dots (QDs) to a single mode of an external-mirror optical microcavity. The external mirror is bonded to a fiber and positioned above a semiconductor sample consisting of a QD-containing GaAs layer grown over a distributed Bragg reflector (DBR). Unlike fully-integrated temperature-tuned microcavities, this open cavity can be rapidly and precisely tuned without changing the QD frequency nor deteriorating its linewidth. With a mirror radius of curvature of 42 microns and a cavity length of 10 microns, the spot size at the concave mirror is closely matched to the single-mode fi ber, off ering high collection effciency directly into the fi ber. With an improved fi nesse (currently F=1000), this system may enter the strong coupling regime.
Applied Physics Letters


semiconductor quantum dots, cavity quantum electrodynamics, quantum optics


Muller, A. , Flagg, E. , Metcalfe, M. , Lawall, J. and Solomon, G. (2021), Coupling an epitaxial quantum dot to a fiber-based external-mirror microcavity, Applied Physics Letters, [online], (Accessed April 16, 2024)
Created June 3, 2021, Updated November 29, 2022