Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 38: Nano-Optics (Single Quantum Emitters) II
Q 38.5: Talk
Wednesday, March 13, 2019, 15:00–15:15, S SR 112 Maschb.
Photonic crystal cavities for efficient coupling to individual Erbium ions — •Lorenz Weiss, Andreas Gritsch, and Andreas Reiserer — Max Planck Institute of Quantum Optics, Garching, Germany
Erbium ions trapped in suited host crystals are promising candidates for large-scale quantum networks since they can combine second-long ground state spin coherence times with coherent optical transitions at telecommunication wavelengths. Unfortunately, the extremely long lifetime of the excited state (14 ms) makes it difficult to spectrally resolve and control individual ions in order to harness them for quantum networks.
To overcome this challenge, we design and fabricate Photonic Crystal Cavities (PCC) on one-dimensional silicon waveguides that can then be transferred to a suited substrate material1. At cryogenic temperature, we thus expect to shorten the radiative lifetime of the optical transitions by more than three orders of magnitude via the Purcell effect. This will enable deterministic interactions between individual spins and single telecom photons, opening unique prospects for the realization of entanglement between spins over distances exceeding 100 km. We will present simulations and the current status of the experiment towards single-ion spectroscopy and control.
References
[1] Dibos et al., Phys. Rev. Lett. 120, 243601 (2018)