title: Imaging and steering an optical wireless nanoantenna link.
abstract: Optical nanoantennas tailor the transmission and reception of optical signals. Owing to their capacity to control the direction and angular distribution of optical radiation over a broad spectral range, nanoantennas are promising components for optical communication in nanocircuits. Here we measure wireless optical power transfer between plasmonic nanoantennas in the far-field and demonstrate changeable signal routing to different nanoscopic receivers via beamsteering. We image the radiation pattern of single-optical nanoantennas using a photoluminescence technique, which allows mapping of the unperturbed intensity distribution around plasmonic structures. We quantify the distance dependence of the power transmission between transmitter and receiver by deterministically positioning nanoscopic fluorescent receivers around the transmitting nanoantenna. By adjusting the wavefront of the optical field incident on the transmitter, we achieve directional control of the transmitted radiation over a broad range of 29°. This enables wireless power transfer from one transmitter to different receivers.
authors.affiliation: 1] 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany [2] Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany [3].
authors.forename: Daniel
authors.initials: D
authors.lastname: Dregely
authors.affiliation: 1] 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany [2] Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany [3] Department of Chemistry, University of Cologne, Luxemburger Strasse 116, 50939 Cologne, Germany [4].
authors.forename: Klas
authors.initials: K
authors.lastname: Lindfors
authors.affiliation: 1] 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany [2] Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany [3] Department of Physics, University of Bayreuth, Universitaetsstrasse 30, 95447 Bayreuth, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Lippitz
authors.affiliation: Department of Electrical and Systems Engineering, University of Pennsylvania, 200 South 33rd Street - ESE 203 Moore, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Nader
authors.initials: N
authors.lastname: Engheta
authors.affiliation: Corporate Research and Technology, Carl Zeiss AG, Carl-Zeiss-Strasse 22, 73447 Oberkochen, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Totzeck
authors.affiliation: 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
authors.forename: Harald
authors.initials: H
authors.lastname: Giessen