Strong radiative coupling between two quantum emitters with arbitrary transition wavelength, position and dipole orientation

Abstract

Strong radiative coupling between two quantum emitters enables the reversible and coherent excitation exchange, while most photonic and plasmonic nanostructures to mediate quantum emitters are inflexible in implementation. We propose a silver line-arc nanowire to realize the strong radiative coupling between two quantum emitters with arbitrary transition wavelength, position and dipole orientation. The resonant wavelength can be remarkably tuned on demand by adjusting its length and diameter. The resonant wavelength, cavity mode, local coupling strength, transfer rate and evolution spectrum are rather robust against its bending. These findings provide significant guidance for the implementation of strong radiative coupling and facilitate quantum information processing.