Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 49: Symposium Quantum Plasmonics (SYQP, jointly with HL, TT)
O 49.5: Hauptvortrag
Mittwoch, 13. März 2013, 17:30–18:00, H1
Non-dipolar & magnetic interactions with optical antennas — Alberto Curto1, Martin Kuttge1, Marta Castro-López1, Ion Hancu1, Tim Taminiau2, and •Niek van Hulst1,3 — 1ICFO - The Institute of Photonic Sciences, Castelldefels, Barcelona — 2Kavli Institute of Nanoscience Delft, the Netherlands — 3ICREA - Barcelona
Plasmonic antennas are ideal to manage the interaction with single photon emitters, such as quantum dots or fluorescent molecules [1]. Tailoring the electromagnetic mode one can control electronic transitions rates and angular emission patterns, which is key for bright directed single photon sources [2]. Here we present three different examples of hybrid emitter-antenna coupled systems where electric dipole, quadrupole or magnetic dipole moments are dominant. Experimental angular radiation patterns show striking differences in the emission of resonant and non-resonant magnetic modes excited by local light sources [3]. Finally we present a magneto-electric antenna: by exploiting the interference between magnetic and electric modes we experimentally realize a compact and robust optical antenna for directed photon emission, which outperforms larger, multi-element antennas in both bandwidth and directionality.
[1] AG Curto et al. Unidirectional emission of a Q-dot coupled to a nanoantenna, Science 329, 930 (2010)
[2] TH Taminiau et al. Optical nanorod antennas as cavities for dipolar emitters: sub- & super-radiant modes, NanoLett. 11, 1020 (2011)
[3] AG Curto et al. Magnetic Resonance of a Nanoslot Optical Antenna, Submitted