24 April 2013 Promoting photons to higher orders

Multipolar Emission Patterns of a Quantum Dot coupled to a Nanowire Optical Antenna

Researchers at ICFO report in Nature Communications on a nanoantenna approach to turn a single photon source into multipolar emission. ICFO researchers Alberto Curto, Tim Taminiau (now at TUDelft), Giorgio Volpe (now at Institut Langevin, Paris), Mark Kreuzer, ICREA Prof. Romain Quidant and ICREA Prof. Niek van Hulst, report in Nature Communications on the resonant coupling of a single photon emitter to an optical nanoantenna, thus creating a hybrid nanoscale source of fundamental electromagnetic modes. In their experiment they selectively couple a quantum dot to the end of a linear metal nanowire antenna. The luminescence of the single quantum dot is emitted beyond the simple Hertz dipole into quadrupolar, octupolar and 16-polar radiation (picture) and even higher order multipoles. The hybrid nano-light-source establishes a basis for the development of innovative quantum nano-optics components with properties not found in nature.

The paper ‘Multipolar radiation of quantum emitters with nanowire optical antennas’ has been published in Nature Communications on April 23rd 2013 by Alberto Curto, Dr. Tim Taminiau, Dr. Giorgio Volpe, Dr. Mark Kreuzer, ICREA Prof. Romain Quidant, leader at ICFO of the PlasmonNanoOptics group and ICREA Prof. Niek van Hulst, leader at ICFO of the Molecular NanoPhotonics group.

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