Exploring ultrafast single-photon emission of silicon-vacancy color centers in diamond nano-membranes coupled with gold nano-cones

H. Kambalathmana; A. M. Flatae; S. Lagomarsino; H. Galal; F. Tantussi; G. C. Messina; E. Wörner; C. Wild; N. Gelli; S. Sciortino; L. Giuntini; F. De Angelis; M. Agio

doi:10.1117/12.2528749

3 September 2019 Exploring ultrafast single-photon emission of silicon-vacancy color centers in diamond nano-membranes coupled with gold nano-cones

H. Kambalathmana, A. M. Flatae, S. Lagomarsino, H. Galal, F. Tantussi, G. C. Messina, E. Wörner, C. Wild, N. Gelli, S. Sciortino, L. Giuntini, F. De Angelis, M. Agio

Author Affiliations +

Proceedings Volume 11091, Quantum Nanophotonic Materials, Devices, and Systems 2019; 1109108 (2019) https://doi.org/10.1117/12.2528749
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

Silicon-vacancy (SiV) color centers in diamond offer novel possibilities to probe light-matter interaction in nano-quantum optics and provide a scalable quantum system suitable for single-photon emission. However, their effective count-rate is still limited by non-radiative decay channels, radiation at wide angles and total internal reflection at the diamond interface. Recently optical antennas have been utilized in order to modify light-matter interaction at the nanoscale. Acting as resonators, they are able to increase the spontaneous emission rate of quantum emitters by several orders of magnitude in a broad spectral range. Because coupling a quantum emitter to a nano-antenna requires close proximity between the two systems, we implant Si ions on very thin diamond membranes that provide the required dimension for near-field interaction in a controlled manner and investigate the optical properties of SiV color centers in such diamond membranes. We consider gold nano-cones as nano-antennas, fabricated by focused electron beam induced deposition (EBID), followed by sputtering and focused ion beam (FIB) milling. The finite-difference time-domain (FDTD) calculations show that gold nano-cones can provide more than four orders of magnitude enhancement in the Purcell factor with an antenna efficiency (AE) of 80%.

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H. Kambalathmana, A. M. Flatae, S. Lagomarsino, H. Galal, F. Tantussi, G. C. Messina, E. Wörner, C. Wild, N. Gelli, S. Sciortino, L. Giuntini, F. De Angelis, and M. Agio "Exploring ultrafast single-photon emission of silicon-vacancy color centers in diamond nano-membranes coupled with gold nano-cones", Proc. SPIE 11091, Quantum Nanophotonic Materials, Devices, and Systems 2019, 1109108 (3 September 2019); https://doi.org/10.1117/12.2528749

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