Strong Coupling Between P1 Diamond Impurity Centres and 3D Lumped Photonic Microwave Cavity

Abstract

We report strong coupling between an ensemble of N impurity (P1) centres in diamond and microwave photons using a unique double post re-entrant cavity. The cavity is designed so that the magnetic component of the cavity field is spatially separated from the electric component and focused into the small volume in which the diamond sample is mounted. The novelty of the structure simultaneously allows high magnetic filling factor (38.4\%) and low frequencies necessary to interact, at low magnetic field, with transitions in diamond such as those in NV${}^{-}$ and P1 centres. Coupling strength (or normal-mode splitting) of 51.42 MHz, was achieved with P1 centres at 6.18 GHz and 220 mT in a centimetre-scale cavity, with a corresponding cooperativity factor of 4.7. This technique offers an alternative way, with some significant advantages, to couple 3D cavities to transitions in diamond and achieve the strong coupling necessary for applications to quantum information processing.

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• Cavity Magnon Polaritons with Lithium Ferrite and 3D Microwave Resonators at milli-Kelvin Temperatures
• Reconfigurable Microwave Photonic Topological Insulator
• Casimir spring and dilution in macroscopic cavity optomechanics
• Towards achieving strong coupling in 3D-cavity with solid state spin resonance
• Loop-gap Microwave Resonator for Hybrid Quantum Systems
• Indirect Coupling between Two Cavity Photon Systems via Ferromagnetic Resonance
• Detection of a weak magnetic field via cavity enhanced Faraday rotation
• Creating Tuneable Microwave Media from a Two-Dimensional Lattice of Re-entrant Posts
• Precision Multi-Mode Dielectric Characterization of a Crystalline Perovskite Enables Determination of the Temperature-Dependent Phase Transitions
• Ultrastrong magnetic light-matter interaction with cavity mode engineering
• Experimental Implementation of a Large Scale Multipost Re-Entrant Array
• A three-dimensional multimode lumped-element resonator for collective spin manipulation and dispersive readout
• Coupling 4H-Silicon Carbide spins to a microwave resonator at milli-Kelvin temperature