Bloch-wave engineered submicron-diameter quantum-dot micropillars for cavity QED experiments

Niels Gregersen, Matthias Lermer, Stephan Reitzenstein, Sven Höfling, Jesper Mørk, Lukas Worschech, Martin Kamp, Alfred Forchel

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The semiconductor micropillar is attractive for cavity QED experiments. For strong coupling, the figure of merit is proportional to Q/√V, and a design combining a high Q and a low mode volume V is thus desired. However, for the standard submicron diameter design, poor mode matching between the cavity and the DBR Bloch mode limits the Q. We present a novel adiabatic design where Bloch-wave engineering is employed to improve the mode matching, allowing the demonstration of a record-high vacuum Rabi splitting of 85 μeV and a Q of 13600 for a 850 nm diameter micropillar.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Pages (from-to)86190X
Number of pages7
Publication statusPublished - 2013
EventSPIE Photonics West : Physics and Simulation of Optoelectronic Devices XXI - San Francisco, CA, United States
Duration: 2 Feb 20137 Feb 2013


ConferenceSPIE Photonics West : Physics and Simulation of Optoelectronic Devices XXI
CountryUnited States
CitySan Francisco, CA


  • Micropillar
  • Adiabatic transition
  • Bloch-wave engineering
  • Strong coupling
  • Cavity quantum electrodynamics
  • Tapering

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