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Plasmonic resonators as optical antenna for single photon sources

François Marquier, Emmanuel Rousseau, Simon Vassant, Alexandre Archambault, Rubén Esteban, T. V. Teperik, Jean‐Jacques Greffet

Published Jun 13, 2010• 0 citations
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Reducing a nonlinear photon pair source to the nanoscale entails drastic reduction in efficiency and thus requires better tools for its evaluation and optimization. In this context, we develop a formalism for the investigation of spontaneous parametric downconversion in hybrid plasmonic structures that combine plasmonic resonances and intrinsic nonlinearity of a nonlinear medium. Combining quantum and numerical approaches, we quantitatively evaluate photon pair correlation for a realistic experimental configuration. We thereby show that hybrid structures embedding a nanocrystal and plasmonic antennas allow for a 10 5 -fold increase in pair production rate in comparison with a single nanocrystal, thus displaying an efficiency close to the best nanoscale sources to date.
Coherent exchange of single photons is at the heart of applied Quantum Optics. The negatively-charged silicon vacancy center in diamond is among most promising sources for coherent single photons. Its large Debye-Waller factor, short lifetime and extraordinary spectral stability is unique in the field of solid-state single photon sources. However, the excitation and detection of individual centers requires high numerical aperture optics which, combined with the need for cryogenic temperatures, puts technical overhead on experimental realizations. Here, we investigate a hybrid quantum photonics platform based on silicon-vacancy center in nanodiamonds and metallic bullseye antenna to realize a coherent single-photon interface that operates efficiently down to low numerical aperture optics with an inherent resistance to misalignment.