Quantum dot micropillar cavities with quality factors exceeding 250,000
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We report on the spectroscopic investigation of quantum dot micropillar cavities with unprecedented quality factors. We observe a pronounced dependency of the quality factor on the measurement scheme and find that significantly larger quality factors can be extracted in photoreflectance compared to photoluminescence measurements. While the photoluminescence spectra of the microcavity resonances feature a Lorentzian lineshape and Q-factors up to 184,000 (±10,000), the reflectance spectra have a Fano-shaped asymmetry and feature significantly higher Q-factors in excess of 250,000 resulting from a full saturation of the embedded emitters. The very high quality factors in our cavities promote strong light-matter coupling with visibilities exceeding 0.5 for a single QD coupled to the cavity mode.
Schneider , C , Gold , P , Reitzenstein , S , Höfling , S & Kamp , M 2016 , ' Quantum dot micropillar cavities with quality factors exceeding 250,000 ' Applied Physics B: Lasers and Optics , vol 122 , no. 1 , 19 , pp. 1-6 . DOI: 10.1007/s00340-015-6283-x
Applied Physics B: Lasers and Optics
© Springer-Verlag Berlin Heidelberg 2016. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1007/s00340-015-6283-x
We acknowledge funding the BMBF within the projects QuaHL-Rep (16BQ1042) and Q.com-H project and by the State of Bavaria.
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