Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 43: Nano-Optics (Single Quantum Emitters)
Q 43.3: Vortrag
Mittwoch, 7. März 2018, 14:45–15:00, K 0.023
Parabolic reflectors and nanostructures in bulk diamond for efficient single photon extraction and cavity coupling — •Tim Schröder1,2, Noel H. Wan1, Brendan J. Shields3, Donggyu Kim1, Sara Mouradian1, Benjamin Lienhard1, Michael Walsh1, Hassaram Bakhru4, and Dirk Englund1 — 1RLE, Massachusetts Institute of Technology, USA — 2Niels Bohr Institute, University of Copenhagen, Denmark — 3Department of Physics, University of Basel, Switzerland — 4SUNY Polytechnic Institute, USA
We present micro- and nanofabrication schemes of photonic devices in bulk diamond. Via high-throughput grey-scale lithography parabolic reflectors are fabricated that allow for simulated broadband collection >75% of the emission of defect centres in diamond [1]. The parabolic diamond-air interface redirects the emission of a defect located at the focal point into a small numerical aperture, reaching a photon extraction efficiency of (48±5)%. For a nitrogen-vacancy centre (NV) the overall detection efficiency is (12±2)%, enabling single photon count rates of up to (5.7±1.0)×106 per second. For the fabrication of photonic crystal cavities from bulk diamond we apply an isotropic undercut process. This process enables instrument-limited optical quality factors exceeding 14 000 within 1 nm of the NV zero phonon line, as well as uniform nanocavity fabrication across a full chip [2].
[1] N. H. Wan, B. J. Shields, D. Kim, S. Mouradian, B. Lienhard, M. Walsh, H. Bakhru, T. Schröder, and D. Englund, arXiv:1711.01704 (2017). [2] S. Mouradian, N. H. Wan, T. Schröder, and D. Englund, Appl. Phys. Lett. 111, 021103 (2017).