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We propose a novel antenna structure which funnels single photons from asingle emitter with unprecedented efficiency into a low-divergence fundamentalGaussian mode. Our device relies on the concept of creating an omnidirectionalphotonic bandgap to inhibit unwanted large-angle emission and to enhancesmall-angle defect-guided-mode emission. The new photon collection strategy isintuitively illustrated, rigorously verified and optimized by implementing anefficient body-of-revolution finite-difference time-domain method for in-planedipole emitters. We investigate a few antenna designs to cover various boundaryconditions posed by fabrication processes or material restrictions andtheoretically demonstrate that collection efficiencies into the fundamentalGaussian mode exceeding 95% are achievable. Our antennas are broadband,insensitive to fabrication imperfections and compatible with a variety ofsolid-state emitters such as organic molecules, quantum dots and defect centersin diamond. Unidirectional and low-divergence Gaussian-mode emission from asingle emitter may enable the realization of a variety of photonic quantumcomputer architectures as well as highly efficient light-matter interfaces.

The Truncated Metallo-dielectric Omnidirectional Reflector: Collecting Single Photons in the Fundamental Gaussian Mode with 95% Efficiency