2016/04/06 by J-M. Le Floch, Jean-Michel Le Floch, Nicolas Delhote +10 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Atomic physics #Condensed matter physics #Coupling (piping) #Diamond #Diamond and Carbon-based Materials Research #Materials science #Microwave #Microwave cavity #Optics #Optoelectronics #Photon #Physics #Q factor #Quantum and electron transport phenomena #Resonance (particle physics) #Resonator #Spin (aerodynamics) #Spins #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1063/1.4946893
published as J. Appl. Phys. 119, 153901 (2016) · 20 pages, 9 figures
arxiv created 2016/04/06 · openalex publication_date 2016/04/15 · openalex created_date 2016/06/24 · arxiv updated 2016/11/03 · openalex updated_date 2026/08/06
We investigate the microwave magnetic field confinement in several microwave three-dimensional (3D)-cavities, using a 3D finite-element analysis to determine the best design and achieve a strong coupling between microwave resonant cavity photons and solid state spins. Specifically, we design cavities for achieving strong coupling of electromagnetic modes with an ensemble of nitrogen vacancy (NV) defects in diamond. We report here a novel and practical cavity design with a magnetic filling factor of up to 4 times (2 times higher collective coupling) than previously achieved using one-dimensional superconducting cavities with a small mode volume. In addition, we show that by using a double-split resonator cavity, it is possible to achieve up to 200 times better cooperative factor than the currently demonstrated with NV in diamond. These designs open up further opportunities for studying strong and ultra-strong coupling effects on spins in solids using alternative systems with a wider range of design parameters. The strong coupling of paramagnetic spin defects with a photonic cavity is used in quantum computer architecture, to interface electrons spins with photons, facilitating their read-out and processing of quantum information. To achieve this, the combination of collective coupling of spins and cavity mode is more feasible and offers a promising method. This is a relevant milestone to develop advanced quantum technology and to test fundamental physics principles.