23 citations · 35 across the 6 of their papers we have counts for
8 papers · 1 filter
Lighting of a monochromatic scatterer with virtual gain
R. Ali
In this work, we discuss the scattering features of a dipolar particle made of large refractive index material by employing the concept of virtual gain and virtual loss. The virtua…
Gain-assisted optical tweezing of plasmonic and large refractive index microspheres
R. Ali, R. S. Dutra, F. A. Pinheiro +1
We have theoretically investigated optical tweezing of gain-functionalized microspheres using a highly focused single beam in the nonparaxial regime. We employ the Mie-Debye theory…
Enantioselection and chiral sorting of single microspheres using optical pulling forces
R. Ali, R. S. Dutra, F. A. Pinheiro +1
We put forward a novel, twofold scheme that enables at the same time all-optical enantioselection and sorting of single multipolar chiral microspheres based on optical pulling forc…
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…
Tailoring optical pulling forces with composite microspheres
R. Ali, F. A. Pinheiro, R. S. Dutra +1
Optical pulling forces or tractor beams can pull particles against light propagation by redirecting the incident photons forward. This is typically achieved using Bessel beams with…
Revisit of generalized Kerker's conditions using composite metamaterials
Rfaqat Ali
Achieving zero backward scattering (ZBS) and zero forward scattering (ZFS), i.e., the so-called the first and second Kerker's conditions respectively, by sphere spherical particles…