title: Three-dimensional winged nanocone optical antennas.
abstract: We introduce 3D optical antennas based on winged nanocones. The antennas support particle plasmon oscillations with current distributions that facilitate transformation of transverse far-field radiation to strong longitudinal local fields near the cone apices. We characterize the optical responses of the antennas by their extinction spectra and by second-harmonic generation microscopy with cylindrical vector beams. The results demonstrate a new 3D polarization-controllable optical antenna for applications in apertureless near-field microscopy, spectroscopy, and plasmonic sensing.
authors: Mikko J
authors: MJ
authors: Huttunen
authors: Klas
authors: K
authors: Lindfors
authors: Domenico
authors: D
authors: Andriano
authors: Jouni
authors: J
authors: Mäkitalo
authors: Godofredo
authors: G
authors: Bautista
authors: Markus
authors: M
authors: Lippitz
authors: Martti
authors: M
authors: Kauranen