'Sawfish' Photonic Crystal Cavity for Near-Unity Emitter-to-Fiber Interfacing in Quantum Network Applications
arXiv:2210.04702 · doi:10.1002/adom.202301286
Abstract
Photon loss is one of the key challenges to overcome in complex photonic quantum applications. Photon collection efficiencies directly impact the amount of resources required for measurement-based quantum computation and communication networks. Promising resources include solid-state quantum light sources, however, efficiently coupling light from a single quantum emitter to a guided mode remains demanding. In this work, we eliminate photon losses by maximizing coupling efficiencies in an emitter-to-fiber interface. We develop a waveguide-integrated 'Sawfish' photonic crystal cavity and use finite element simulations to demonstrate that our system transfers, with 97.4% efficiency, the zero-phonon line emission of a negatively-charged tin vacancy center in diamond adiabatically to a single-mode fiber. A surrogate model trained by machine learning provides quantitative estimates of sensitivities to fabrication tolerances. Our corrugation-based design proves robust under state-of-the-art nanofabrication parameters, maintaining an emitter-to-fiber coupling efficiency of 88.6%. To demonstrate its potential in reducing resource requirements, we apply the Sawfish cavity to a recent one-way quantum repeater protocol.
Main part: 16 pages, 7 figures
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Cited by in corpus (7)
- Fabrication of Sawfish photonic crystal cavities in bulk diamond
- Quantum Electrometer for Time-Resolved Material Science at the Atomic Lattice Scale
- Efficient Microwave Spin Control of Negatively Charged Group-IV Color Centers in Diamond
- Optical probing of phononic properties of a tin-vacancy color center in diamond
- Above-Unity Coherent Cooperativity of Tin-Vacancy Centers in Diamond Photonic Crystal Cavities
- Software Framework for Optically Accessible Quantum Memory Using Group-IV Color Centers in Diamond
- Waveguide-integrated colour centres in silicon carbide with broadband photonic crystal reflectors for efficient readout