Abstract
Plasmonic nanoantennas sustain an extraordinary ability to concentrate light in subwavelength spatial domains. This confinement is accompanied with a corresponding enhancement. Hence, unprecedented light-matter coupling strength can achieved to quantum emitters positioned near the focal point. Thus, utilization of nanoantennas holds promise for rapid addressing of chip-integrated quantum emitters with light, or for a significant boost of performance of such quantum emitters as nonclassical light sources. Moreover, nanoantennas can be exploited to engineer the emission characteristics, or even quantum properties of light, such as statistics or degree of entanglement. To discuss these applications, we have developed a framework that treats nanoantennas as open cavities of arbitrary spectra, coupled to quantum emitters characterized by a configuration of discrete energy levels. In this way, we drop the usual, but often unrealistic assumption of a single-Lorentzian nanoantenna spectrum. In this contribution we introduce the method and apply it to several example designs tailored for specific functionalities.
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