We suggest a novel source of polarization-entangled photon pairs based on a cross-shaped plasmonic nanoantenna driven by a single quantum dot. The integration of the nanoantenna with a metal mirror overcomes the fundamental tradeoff between the spontaneous emission (SE) enhancement and the extraction efficiency typical of microcavity and nanowire-based architectures. With a very-high extraction efficiency of entangled photons (~90%) at 1.55 um and large SE enhancement (~90) over a broad 330 nm spectral range, the proposed design will pave the way toward reliable integrated sources of nonclassical light.
@article{arxiv.1206.5203,
title = {Plasmonic Nanoantennas for Efficient Control of Polarization-Entangled Photon Pairs},
author = {Ivan S. Maksymov and Andrey E. Miroshnichenko and Yuri S. Kivshar},
journal= {arXiv preprint arXiv:1206.5203},
year = {2015}
}