70 citations · 201 across the 12 of their papers we have counts for
8 papers · 1 filter
Theory of optical tweezing of dielectric microspheres in chiral host media and its applications
Rfaqat Ali, R. S. Dutra, F. A. Pinheiro +2
We report for the first time the theory of optical tweezers of spherical dielectric particles embedded in a chiral medium. We develop a partial-wave (Mie) expansion to calculate th…
Probing the optical chiral response of single nanoparticles with optical tweezers
R. Ali, F. A. Pinheiro, R. S. Dutra +2
We propose an enantioselective scheme to sort homogeneous chiral particles using optical tweezers. For a certain range of material parameters, we show that a highly focused circula…
Enantioselective manipulation of chiral nanoparticles using optical tweezers
R. Ali, F. A. Pinheiro, F. S. S. Rosa +2
We put forward an enantioselective method for chiral nanoparticles using optical tweezers. We demonstrate that the optical trapping force in a typical, realistic optical tweezing s…
Optimizing optical tweezing with directional scattering in composite microspheres
R. Ali, F. A. Pinheiro, F. S. S. Rosa +2
Trapping of microspheres with a single focused laser beam is usually limited to materials with relative refractive indexes slightly larger than one. We show that directional light…
Rigorous analysis of Casimir and van der Waals forces on a silicon nano-optomechanical device actuated by optical forces
Janderson R. Rodrigues, Andre Gusso, Felipe S. S. Rosa +1
In this article, we rigorously analyze the effects of the dispersion forces (Casimir and van der Waals forces) on a nano-optomechanical device based on a silicon waveguide and a si…
Probing the Casimir force with optical tweezers
D. S. Ether, L. B. Pires, S. Umrath +10
We propose to use optical tweezers to probe the Casimir interaction between microspheres inside a liquid medium for geometric aspect ratios far beyond the validity of the widely em…
Molding the flow of light with a magnetic field: plasmonic cloaking and directional scattering
W. J. M. Kort-Kamp, F. S. S. Rosa, F. A. Pinheiro +1
We investigate electromagnetic scattering and plasmonic cloaking in a system composed by a dielectric cylinder coated with a magneto-optical shell. In the long-wavelength limit we…
Tuning plasmonic cloaks with an external magnetic field
W. J. M. Kort-Kamp, F. S. S. Rosa, F. A. Pinheiro +1
We propose a mechanism to actively tune the operation of plasmonic cloaks with an external magnetic field by investigating electromagnetic scattering by a dielectric cylinder coate…