20 citations · 30 across the 4 of their papers we have counts for
5 papers
Feedback cooling of a levitated nanoparticle in a radially polarized vector beam trap
Felipe Almeida, M. Rademacher, J. M. H. Gosling +1
We demonstrate optical levitation and feedback cooling of a silica nanoparticle (radius = 78~nm) trapped within a radial vector beam (RVB) in high vacuum. Radial vector beams, when…
Levitated optomechanics with cylindrically polarized vortex beams
Felipe Almeida, Peter Barker
Optically levitated and cooled nanoparticles are a new quantum system whose application to the creation of non-classical states of motion and quantum limited sensing is fundamental…
All-optical Saddle Trap
Daniel Tandeitnik, Oscar Kremer, Felipe Almeida +3
The superposition of frequency-shifted Laguerre-Gauss modes can produce a rotating saddle-like intensity profile. When spinning fast enough, the optical forces produced by this str…
Trapping microparticles in a structured dark focus
F. Almeida, I. Sousa, O. Kremer +5
We experimentally demonstrate stable trapping and controlled manipulation of silica microspheres in a structured optical beam consisting of a dark focus surrounded by light in all…
Relaxing constraints on data acquisition and position detection for trap stiffness calibration in optical tweezers
Bruno Melo, Felipe Almeida, Guilherme Temporão +1
Optical tweezers find applications in various fields, ranging from biology to physics. One of the fundamental steps necessary to perform quantitative measurements using trapped par…