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Bloch-wave engineering of quantum dot-micropillars for cavity quantum electrodynamics experiments

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arxiv 1107.2492 v2 pith:MWWJCAKN submitted 2011-07-13 physics.optics

Matthias Lermer , Niels Gregersen , Florian Dunzer , Stephan Reitzenstein , Sven Höfling , Jesper M{o}rk , Lukas Worschech , Martin Kamp
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Alfred Forchel
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classification physics.optics
keywords modequantumblochbloch-wavecavitydiameterengineeringfactor
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We have employed Bloch-wave engineering to realize submicron diameter ultra-high quality factor GaAs/AlAs micropillars (MPs). The design features a tapered cavity in which the fundamental Bloch mode is subject to an adiabatic transition to match the Bragg mirror Bloch mode. The resulting reduced scattering loss leads to record-high visibility of the strong coupling in MPs with modest oscillator strength quantum dots. A quality factor of 13,600 and a Rabi splitting of 85 \mueV with an estimated visibility v of 0.38 are observed for a small mode volume MP with a diameter dc of 850 nm.

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