Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.71: Poster

Tuesday, March 7, 2017, 17:00–19:00, P OG1+2

Robust Silicon-Vacancy Single Photon Sources — •Assegid Mengistu Flatae^1,2, Francesco Tantussi², Stefano Lagomarsino¹, Gabriele Messina², Hossam Galal¹, Ahmad Mohammadi³, Francesco De Angelis², and Mario Agio¹ — ¹Laboratory of Nano-Optics, University of Siegen, 57072 Siegen, Germany — ²Italian Institute of Technology, 16163 Genova, Italy — ³Department of Physics, Persian Gulf University, 75196 Bushehr, Iran

In quantum information science and in fundamental quantum optics a robust narrow-band solid-state single-photon source is desirable. We currently develop techniques for the fabrication and optical characterization of single photon-sources based on the silicon vacancy (SiV) in diamond. SiV color centers are promising candidates as most of the fluorescence signal is concentrated in a narrow zero-phonon line at 738 nm, with a room temperature line-width down to about - 1 nm. In addition, the center exhibits a short excited-state life-time (~ 1 ns) and a very small inhomogeneous broadening. The photonic environment around the single SiV color center can be exploited to control the radiative rate, the quantum efficiency, the angular distribution and the polarization of the emitted photons. Plasmonic gold nano-antennas are particularly interesting for these purposes, as they can achieve a much smaller mode volume in the confined near field (~ 7 orders of magnitude tighter than solid-state micro-cavities) and can easily match the emission wavelength of the emitter due to their broad Plasmon resonances. We design, fabricate and characterize gold nano-antennas for enhancing the emission properties of Siv color centers.