Enhanced Molecular Spin-Photon Coupling at Superconducting Nanoconstrictions
Enhanced Molecular Spin-Photon Coupling at Superconducting Nanoconstrictions
We combine top-down and bottom-up nanolithography to optimize the coupling of small molecular spin ensembles to $1.4$ GHz on-chip superconducting resonators. Nanoscopic constrictions, fabricated with a focused ion beam at the central transmission line, locally concentrate the microwave magnetic field. Drops of free-radical molecules have been deposited from solution onto …