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Conference on Lasers and Electro-Optics

Toward Coherent Control of Single Yb 3 + Ions in a Nanophotonic Cavity

Jonathan M. Kindem, Andrei Ruskuc, John G. Bartholomew, Jake Rochman, Andrei Faraon

Published May 5, 2019• 0 citations
Publisher

Abstract

We report on detection and coherent optical driving of single Yb^(3+) ions coupled to a nanophotonic resonator fabricated in the YVO_4 host crystal and outline a path toward control of single ^(171)Yb^(3+) spins.
DOI
10.23919/cleo.2019.8749747

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A hybrid quantum photonic interface for 171^{171}171Yb solid-state qubits
171^{171}171Yb3+^{3+}3+ in YVO4_44​ is a promising candidate for building quantum networks with good optical addressability, excellent spin properties and a secondary nuclear-spin quantum register. However, the associated long optical lifetime necessitates coupling to optical resonators for faster emission of single photons and to facilitate control of single 171^{171}171Yb ions. Previously, single 171^{171}171Yb ions were addressed by coupling them to monolithic photonic crystal cavities fabricated via lengthy focused ion beam milling. Here, we design and fabricate a hybrid platform based on ions coupled to the evanescently decaying field of a GaAs photonic crystal cavity. We experimentally detect and demonstrate coherent optical control of single 171^{171}171Yb ions. For the most strongly coupled ions, we find a 64 fold reduction in lifetime. The results show a promising route towards a quantum network with 171^{171}171Yb:YVO4_44​ using a highly scalable platform.
We demonstrate optical probing of spectrally resolved single Nd^{3+} rare-earth ions in yttrium orthovanadate. The ions are coupled to a photonic crystal resonator and show strong enhancement of the optical emission rate via the Purcell effect, resulting in near radiatively limited single photon emission. The measured high coupling cooperativity between a single photon and the ion allows for the observation of coherent optical Rabi oscillations. This could enable optically controlled spin qubits, quantum logic gates, and spin-photon interfaces for future quantum networks.