Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 53: Poster: Quantum Optics and Photonics III
Q 53.67: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG2
Efficient solid-state light-matter interfaces based on dielectric slot waveguides and diamond colour centers — •Martin Zeitlmair1, Philipp Altpeter1, Peter Fischer1, Markus Weber3, and Harald Weinfurter1,2 — 1Ludwig-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching — 3Max-Planck-Institut für die Physik des Lichts, Erlangen
Future applications in applied quantum information science and ultra-sensitive spectroscopy rely on efficient interaction between light and matter. Such light-matter interfaces require two key components: A waveguiding structure to control the propagation of photons and a quantum light source emitting single photons. Here, we present major progress towards a novel on-chip interface based on broadband dielectric slot waveguides for evanescent coupling of nanophotonic emitters and nitrogen-vacancy centers in nanodiamonds.
We choose Ta2O5 as a material platform due to its high dielectric contrast and low autofluorescence. By applying a lithographic top-down fabrication process, single-mode waveguides with low propagation losses of about 1dB/mm are created. A subsequent ion-beam milling process enables the production of air slots providing the strong confinement of optical waveguide modes, which should make high coupling efficiencies of optical waveguide structures possible. By choosing an optimised waveguide geometry coupling efficiencies over 50% for the whole spectrum of the NV-center can be expected.