Erlangen 2022 – scientific programme

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SYPD: PhD Symposium - Solid-state Quantum Emitters Coupled to Optical Microcavities

SYPD 1: Solid-state quantum emitters coupled to optical microcavities

SYPD 1.3: Invited Talk

Monday, March 14, 2022, 17:30–18:00, AKjDPG-H17

New host materials for individually addressed rare-earth ions — •Sebastian Horvath, Salim Ourari, Lukasz Dusanowski, Christopher Phenicie, Isaiah Gray, Paul Stevenson, Nathalie de Leon, and Jeff Thompson — Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, USA

Erbium ions in crystalline hosts, which have an optical transition at 1.5 μm, are promising as single photon sources and quantum memories for quantum repeater networks operating directly in the telecom-band. Rare-earth ions can be incorporated into a wide range of host materials; however, the choice can dramatically impact the spin and optical coherence properties. Two key factors determining these properties are the presence of species with a magnetic dipole moment, as well as the point-group symmetry of the substitutional site. From this we develop a set of design principles for an optimized host material, which leads us to a detailed investigation of the hosts MgO and CaWO4. Single erbium ions were isolated using heterogeneously integrated silicon photonic crystal cavities, and both the optical and spin properties were probed using single shot readout. With this approach, we have studied sources of decoherence for both Er:MgO and Er:CaWO4, and developed materials processing techniques to improve the performance of this platform. I will discuss refinements to our design considerations developed from our results to date and share the current status of our single erbium ion platform for the efficient generation of spin-photon entanglement.