title: Bloch-wave engineering of quantum dot micropillars for cavity quantum electrodynamics experiments.
abstract: We have employed Bloch-wave engineering to realize submicron diameter 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 vacuum Rabi splitting of the strong coupling in MPs with modest oscillator strength quantum dots. A quality factor of 13, 600 and a splitting of 85  μeV with an estimated visibility v of 0.41 are observed for a small mode volume MP with a diameter d{c} of 850 nm.
authors.affiliation: Technische Physik, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Lermer
authors.forename: N
authors.initials: N
authors.lastname: Gregersen
authors.forename: F
authors.initials: F
authors.lastname: Dunzer
authors.forename: S
authors.initials: S
authors.lastname: Reitzenstein
authors.forename: S
authors.initials: S
authors.lastname: Höfling
authors.forename: J
authors.initials: J
authors.lastname: Mørk
authors.forename: L
authors.initials: L
authors.lastname: Worschech
authors.forename: M
authors.initials: M
authors.lastname: Kamp
authors.forename: A
authors.initials: A
authors.lastname: Forchel