Mode imaging and selection in strongly coupled nanoantennas
arXiv:1002.3887 · doi:10.1021/nl100614p
Abstract
The number of eigenmodes in plasmonic nanostructures increases with complexity due to mode hybridization, raising the need for efficient mode characterization and selection. Here we experimentally demonstrate direct imaging and selective excitation of the bonding and antibonding plasmon mode in symmetric dipole nanoantennas using confocal two-photon photoluminescence mapping. Excitation of a high-quality-factor antibonding resonance manifests itself as a two-lobed pattern instead of the single spot observed for the broad bonding resonance, in accordance with numerical simulations. The two-lobed pattern is observed due to the fact that excitation of the antibonding mode is forbidden for symmetric excitation at the feedgap, while concomitantly the mode energy splitting is large enough to suppress excitation of the bonding mode. The controlled excitation of modes in strongly coupled plasmonic nanostructures is mandatory for efficient sensors, in coherent control as well as for implementing well-defined functionalities in complex plasmonic devices.
11 pages, 5 figures, 1 supplementary information
References in corpus (1)
Cited by in corpus (20)
- Nanoantennas for visible and infrared radiation
- Atomically flat single-crystalline gold nanostructures for plasmonic nanocircuitry
- Optical Yagi-Uda nanoantennas
- Atomic-scale confinement of optical fields
- Ultrabright Linearly Polarized Photon Generation from a Nitrogen Vacancy Center in a Nanocube Dimer Antenna
- Dynamics of four-photon photoluminescence in gold nanoantennas
- Circular Optical Nanoantennas: An Analytical Theory
- Plasmonic Antennas as Design Elements for Coherent Ultrafast Nanophotonics
- Multimode plasmon excitation and in-situ analysis in top-down fabricated plasmonic nanocircuits
- Reading the orbital angular momentum of light using plasmonic nanoantennas
- Delocalization of nonlinear optical responses in plasmonic nanoantennas
- Adaptive on-chip control of nano-optical fields with optoplasmonic vortex nanogates
- Plasmonic nanoantenna design and fabrication based on evolutionary optimization
- Nonclassical optical properties of mesoscopic gold
- Photoluminescence-driven Broadband Transmitting Directional Optical Nanoantennas
- Plasmonic mode converter for controlling optical impedance and nanoscale light-matter interaction
- Selective excitation of bright and dark plasmonic resonances of single gold nanorods
- Driving plasmonic nanoantennas at perfect impedance matching using generalized coherent perfect absorption
- Efficient hybrid-mode excitation in plasmonic nanoantennas by tightly focused higher-order vector beams
- Dark-modes excitation in coupled nano Fabry-Perot structure induced by symmetry breaking