Enhanced localized fluorescence in plasmonic nanoantennae. Strong enhancement of the radiative decay rate of emitters by single plasmonic nanoantennas. Exploring the chemical enhancement for surface-enhanced Raman scattering with Au bowtie nanoantennas. Toward nanometer-scale optical photolithography: utilizing the near-field of bowtie optical nanoantennas. Enhancement of single-molecule fluorescence using a gold nanoparticle as an optical nanoantenna. Single quantum dot coupled to a scanning optical antenna: a tunable superemitter. Optical properties of coupled metallic nanorods for field-enhanced spectroscopy. Mühlschlegel, P., Eisler, H.-J., Martin, O. Improving the mismatch between light and nanoscale objects with gold bowtie nanoantennas. Gap-dependent optical coupling of single ‘bowtie’ nanoantennas resonant in the visible. Optical antennas: resonators for local field enhancement. Here, we present the experimental demonstration of directional control of radiation from a nano-optical Yagi–Uda antenna composed of appropriately tuned gold nanorods.Ĭrozier, K. By fabricating a corresponding array of nanoparticles, similar radiation patterns can be obtained in the optical regime 15, 16, 17, 18. In the radiofrequency regime, a typical antenna design for high directivity is the Yagi–Uda antenna, which essentially consists of a one-dimensional array of antenna elements driven by a single feed element. Because most of these devices are designed to optimize the local near-field coupling between the antenna and an emitter, the possibility of modifying the spatial radiation pattern has not yet received as much attention 13, 14. Recently, rapid progress has been made in the realization of single-element antennas for optical waves 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. The plasmon resonance of metal nanoparticles can direct light from optical emitters in much the same way that radiofrequency antennas direct the emission from electrical circuits.
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