title: One- and two-dimensional photonic crystal microcavities in single crystal diamond.
abstract: Diamond is an attractive material for photonic quantum technologies because its colour centres have a number of outstanding properties, including bright single photon emission and long spin coherence times. To take advantage of these properties it is favourable to directly fabricate optical microcavities in high-quality diamond samples. Such microcavities could be used to control the photons emitted by the colour centres or to couple widely separated spins. Here, we present a method for the fabrication of one- and two-dimensional photonic crystal microcavities with quality factors of up to 700 in single crystal diamond. Using a post-processing etching technique, we tune the cavity modes into resonance with the zero phonon line of an ensemble of silicon-vacancy colour centres, and we measure an intensity enhancement factor of 2.8. The controlled coupling of colour centres to photonic crystal microcavities could pave the way to larger-scale photonic quantum devices based on single crystal diamond.
authors.affiliation: Universität des Saarlandes, Fachrichtung 7.2 (Experimentalphysik), 66123 Saarbrücken, Germany.
authors.forename: Janine
authors.initials: J
authors.lastname: Riedrich-Möller
authors.forename: Laura
authors.initials: L
authors.lastname: Kipfstuhl
authors.forename: Christian
authors.initials: C
authors.lastname: Hepp
authors.forename: Elke
authors.initials: E
authors.lastname: Neu
authors.forename: Christoph
authors.initials: C
authors.lastname: Pauly
authors.forename: Frank
authors.initials: F
authors.lastname: Mücklich
authors.forename: Armin
authors.initials: A
authors.lastname: Baur
authors.forename: Michael
authors.initials: M
authors.lastname: Wandt
authors.forename: Sandra
authors.initials: S
authors.lastname: Wolff
authors.forename: Martin
authors.initials: M
authors.lastname: Fischer
authors.forename: Stefan
authors.initials: S
authors.lastname: Gsell
authors.forename: Matthias
authors.initials: M
authors.lastname: Schreck
authors.forename: Christoph
authors.initials: C
authors.lastname: Becher
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