Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 44: Quantum Optics of Solid State Photon Sources
Q 44.4: Talk
Thursday, March 17, 2011, 11:30–11:45, HSZ 02
Realization of photonic crystal microcavities in single crystal diamond — •Janine Riedrich-Möller1, Laura Kipfstuhl1, Christian Hepp1, Martin Fischer2, Stefan Gsell2, Matthias Schreck2, and Christoph Becher1 — 1Universität des Saarlandes, Fachrichtung 7.2 (Experimentalphysik), Campus E2.6, 66123 Saarbrücken — 2Universität Augsburg, Experimentalphysik IV, 86159 Augsburg
Microcavities in two-dimensional photonic crystal slabs allow to strongly confine light in volumes of about one cubic wavelength. They are expected to enable the realization of highly efficient emitters and control of spontaneous emission. Such photonic crystal microcavities are routinely fabricated in semiconductor materials. On the other hand, in recent years diamond has attracted significant interest as material for quantum information processing due to the extraordinary properties of optically active defect centers. These so called colour centers can be employed e.g. for cavity enhanced single photon sources that operate at room temperature or cavity-based atom-photon interfaces. We here investigate the fabrication of photonic crystal cavities in single crystalline diamond grown on an Iridium layer. We produce free-standing diamond membranes by dry-etching techniques and pattern them by focussed ion beam milling (FIB). We both realize 1D nanobeam cavities etched in a freestanding waveguide and 2D cavities with several missing holes in a triangular lattice. For the 2D cavities we experimentally obtain quality factors of Q = 300.