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Quantum dot micropillar cavities with quality factors exceeding 250,000

Research output: Contribution to journalArticle

Author(s)

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

School/Research organisations

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.

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Original languageEnglish
Article number19
Pages (from-to)1-6
Number of pages6
JournalApplied Physics B: Lasers and Optics
Volume122
Issue number1
DOIs
Publication statusPublished - 1 Jan 2016

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