Optical tweezers (OTs), which generate a variety of fascinating beam patterns, allow
biologists to uncover the natural secrets of human life at single-cell level. Due to its gentle …

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 …

The superposition of a Gaussian mode and a Laguerre-Gauss mode with ℓ= 0, p≠ 0
generates the so-called bottle beam: a dark focus surrounded by a bright region. In this …

We measure the colloidal interaction between two silica microspheres in an aqueous
solution in the distance range from 0.2 to 0.5 μ m with the help of optical tweezers. When …

Building on conventional dual-fiber optical trap systems, we have developed a multichannel
dual-fiber optical trap chip that is simple and low-cost. This chip features three channels …

Optical antennas are promising for optical trapping and particle manipulation, when
converting light between localized energy and freely propagating radiation. In this paper, we …

We previously introduced the use of DNA molecules for calibration of biophysical force and
displacement measurements with optical tweezers. Force and length scale factors can be …

Abstract Almeida da Silva, Felipe; Barbosa dos Santos Guerreiro, Thiago (Advisor). Optical
tweezers and structured light: trapping microparticles in a dark focus. Rio de Janeiro, 2023 …

First, I would like to thank Professor Thiago Guerreiro for having introduced me to the field of
Quantum Optomechanics, which deeply captivated me over the last two years. When I …