31 citations · 108 across the 11 of their papers we have counts for
10 papers · 1 filter
Polarisation Control of Nanoantenna Cold Spots
Alexander J. Vernon, Francisco J. Rodríguez-Fortuño
Cold spots are sub-wavelength regions which might emerge near a plasmonic nanoantenna, should one or more components of some far-field illumination cancel out with scattered light.…
The dependence of evanescent wave polarization on the losses of guided optical modes
Sinuhé Perea-Puente, Francisco J. Rodríguez-Fortuño
Spin-momentum locking of evanescent waves describes the relationship between the propagation constant of an evanescent mode and the polarization of its electromagnetic field, givin…
Enhancement of recoil optical forces via high-k plasmons on thin metallic films
J. A. Girón-Sedas, Francisco J. Rodríguez-Fortuño
The recoil optical force that acts on emitters near a surface or waveguide relies on near-field directionality and conservation of momentum. It features desirable properties uncomm…
Optical magnetic dipole levitation using a plasmonic surface
Jack J. Kingsley-Smith, Michela F. Picardi, Francisco J. Rodríguez-Fortuño
Optically-induced magnetic resonances in non-magnetic media have unlocked magnetic light-matter interactions and led to new technologies in many research fields. Previous proposals…
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…
Repulsion of polarized particles from two-dimensional materials
Francisco J. Rodríguez-Fortuño, Michela F. Picardi, Anatoly V. Zayats
Repulsion of nanoparticles, molecules and atoms from surfaces can have important applications in nanomechanical devices, microfluidics, optical manipulation and atom optics. Here,…
Lateral forces on nanoparticles near a surface under circularly-polarized plane-wave illumination
Francisco J. Rodríguez-Fortuño, Alejandro Martínez, Nader Engheta +1
Optical forces allow manipulation of small particles and control of nanophotonic structures with light beams. Here, we describe a counter-intuitive lateral optical force acting on…
Regarding the "Comments on 'Near-field interference for the unidirectional excitation of electromagnetic guided modes' " by Lee et al
Francisco J. Rodríguez-Fortuño, Giuseppe Marino, Pavel Ginzburg +4
We would like to clarify the misunderstanding caused by comment [arXiv:1306.5068 (2013)] on our article [Science 340, 328 (2013)]. The vectorial near-field interference effect desc…
Avoiding metallic walls: Use of modal superposition in plasmonic waveguides to reduce propagation loss
Francisco J. Rodríguez-Fortuño, Nader Engheta
We theoretically explore the possibility of reducing the propagation loss in a metal-insulator-metal (MIM) waveguide, using mode combinations to achieve wall-avoiding field distrib…