151 citations · 305 across the 8 of their papers we have counts for
8 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…
Adding a spin to Kerker's condition: arbitrary scattering direction tuning of nano-antennas with designed excitation
Lei Wei, Nandini Bhattacharya, H. Paul Urbach
We describe a method to control the directional scattering of a high index dielectric nanosphere, which utilizes the unique focusing properties of an azimuthally polarized phase vo…
Excitation of radiationless anapole mode of isotropic dielectric nanoparticles with tightly focused radially polarized beam
Lei Wei, Zheng Xi, Nandini Bhattacharya +1
A high index dielectric nano-sphere can be excited and yet remain radiationless. A method to excite the non-radiating anapole mode of a high index isotropic dielectric nanosphere i…
Shaping the focal field of radially/azimuthally polarized phase vortex with Zernike polynomials
Lei Wei, H. Paul Urbach
The focal field properties of radially/azimuthally polarized Zernike polynomials are studied. A method to design the pupil field in order to shape the focal field of radially or az…