We present a generic microcavity platform for cavity experiments on optically active nanostructures, such as quantum dots, nanocrystals, color centers, and carbon nanotubes. The cavity is of the Fabry-Pérot type with a planar back mirror and a miniature concave top mirror with radius of curvature ∼ 100 μm. Optical access is achieved by free beam coupling, allowing good mode-matching to the cavity mode. The cavity has a high Q-factor, reasonably small mode volume, open access, spatial and spectral tunability, and operates at cryogenic temperatures. Spectral and spatial tuning of the Purcell effect (weak coupling regime) on a single InGaAs quantum dot is demonstrated.
A tunable microcavity
Russell J. Barbour, Paul A. Dalgarno, Arran Curran, Kris M. Nowak, Howard J. Baker, Denis R. Hall, Nick G. Stoltz, Pierre M. Petroff, Richard J. Warburton; A tunable microcavity. J. Appl. Phys. 1 September 2011; 110 (5): 053107. https://doi.org/10.1063/1.3632057
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