Quantum dot micropillar cavities with quality factors exceeding 250,000

C. Schneider; P. Gold; S. Reitzenstein; S. Höfling; M. Kamp

doi:10.1007/s00340-015-6283-x

Quantum dot micropillar cavities with quality factors exceeding 250,000

C. Schneider^*, P. Gold, S. Reitzenstein, S. Höfling, M. Kamp

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	19
Pages (from-to)	1-6
Number of pages	6
Journal	Applied Physics B: Lasers and Optics
Volume	122
Issue number	1
DOIs	https://doi.org/10.1007/s00340-015-6283-x
Publication status	Published - 1 Jan 2016

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Hoefling_2016_APB_QuantumDot_AM
© 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
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abstract = "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.",

author = "C. Schneider and P. Gold and S. Reitzenstein and S. H{\"o}fling and M. Kamp",

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AU - Schneider, C.

AU - Gold, P.

AU - Reitzenstein, S.

AU - Höfling, S.

AU - Kamp, M.

N1 - We acknowledge funding the BMBF within the projects QuaHL-Rep (16BQ1042) and Q.com-H project and by the State of Bavaria.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - 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.

AB - 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.

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Quantum dot micropillar cavities with quality factors exceeding 250,000

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