• Brownian
  • We use graphene as prototype material to unravel the consequences of the fluctuation−dissipation theorem in two dimensions, by studying the Brownian motion of optically trapped graphene flakes. (blogspot.com)
  • The understanding of optical trapping of two-dimensional nanostructures gained through our Brownian motion analysis paves the way to light-controlled manipulation and all-optical sorting of biological membranes and anisotropic macromolecules. (blogspot.com)
  • Since the switching of the input holograms degrades the spatial stability of trapping a Brownian particle within the generated intensity spot area, it is necessary to numerically investigate the conditions in the time-division multiplexing for a particle to be stably trapped by a focused Gaussian beam. (blogspot.com)
  • characterized by a s
  • The trade-off can be characterized by a single dimensionless trapping parameter, which increases with bead size to wavelength ratio $a/\lambda$ and refractive index contrast $m$ and decreases with NA. (blogspot.com)
  • potential
  • We report a method for microfluidic multiple trapping and continuous sorting of microparticles using an optical potential landscape projected by a Dammann grating, enabling a high power-efficient approach to forming a composite two-dimensional spots array with high uniformity. (blogspot.com)
  • Power
  • In addition to the exponential selectivity by the projected optical landscapes, the proposed microfluidic sorting system has advantages in terms of high power efficiency and high uniformity due to the Dammann grating. (blogspot.com)
  • light
  • These orient orthogonal to the light polarization, due to the optical constants anisotropy. (blogspot.com)
  • Time-division multiplexing in the proposed holographic optical tweezers (HOT) has been used to quasi-simultaneously generate two different intensity patterns, a carrier beam spot and a beam array, by alternately feeding the corresponding hologram patterns to a spatial light modulator (SLM). (blogspot.com)