5 papers
Far-field and near-field directionality in acoustic scattering
Lei Wei, Francisco J. Rodríguez-Fortuño
Far-field directional scattering and near-field directional coupling from simple sources have recently received great attention in photonics: beyond circularly-polarized dipoles, w…
Momentum-space geometric structure of helical evanescent waves and its implications on near-field directionality
Lei Wei, Francisco J. Rodríguez-Fortuño
In this work, a momentum-space geometrical structure in helical evanescent electromagnetic waves is revealed. It is shown that for every helical evanescent wave on a helicity-depen…
Optical forces from near-field directionalities in planar structures
Jack J. Kingsley-Smith, Michela F. Picardi, Lei Wei +2
Matter manipulation with optical forces has become commonplace in a wide range of research fields and is epitomized by the optical trap. Calculations of optical forces on small ill…
Interferometric evanescent wave excitation of nano-antenna for ultra-sensitive displacement and phase metrology
Lei Wei, Anatoly V. Zayats, Francisco J. Rodríguez-Fortuño
We propose a method for ultra-sensitive displacement and phase metrology based on the interferometric evanescent wave excitation of nano-antennas. We show that with a proper choice…
Directional scattering from particles under evanescent wave illumination: the role of reactive power
Lei Wei, Michela F. Picardi, Jack J. Kingsley-Smith +2
Study of photonic spin-orbital interactions, which involves control of the propagation and spatial distributions of light with the polarization of electromagnetic fields, is not on…