Recent advances in optical antennas have strongly impacted the nano-optic community due to their ability to enhance light-matter interactions at subwavelength length scales and over spectrally broad bandwidths. Interaction between localized light emitters and optical antennas has been deeply investigated in order to (i) enhance the radiative time constants and radiative efficiency of emitters and also (ii) to redirect the electromagnetic radiation. Reciprocally, when illuminated from the far-field, optical antennas can focus light into tiny spots which permits to probe the local environment with a high resolution. Consequently, optical antennas have been embraced by many researchers for improved spectroscopy techniques (SERS, SEIRA, etc.), but also to enhance photovoltaic devices or to realize single-photon nonlinearities in quantum optics. All this progress has been permitted, on the one hand, by an emerging dialogue between physicists and electrical engineers that provides a new understanding of nano-optics and, on the other hand, by the recent advances of top-down (FIB, e-beam lithography) and bottom-up nanofabrication technologies. In this context, it is expected that chemical functionalization and self-assembled nanoantennas will play a key role in the near future to realize new nanoantenna designs. Potential topics include, but are not limited to:

• Plasmonic antennas for radiative enhancement
• Directional antennas
• Impedance of optical antennas
• Nonlinear antennas
• Antennas for scanning near field optics (SNOM)
• Antennas for spectroscopy
• Nanofabrication: FIB, e-beam lithography, and self-assembled antennas

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