335 citations · 455 across the 2 of their papers we have counts for
5 papers
Characterizing and tracking single colloidal particles with video holographic microscopy
Sang-Hyuk Lee, Yohai Roichman, Gi-Ra Yi +5
We use digital holographic microscopy and Mie scattering theory to simultaneously characterize and track individual colloidal particles. Each holographic snapshot provides enough i…
Giant Colloidal Diffusivity on Corrugated Optical Vortices
Sang-Hyuk Lee, David G. Grier
A single colloidal sphere circulating around a periodically modulated optical vortex trap can enter a dynamical state in which it intermittently alternates between freely running a…
Flux reversal in a two-state symmetric optical thermal ratchet
Sang-Hyuk Lee, David G. Grier
A Brownian particle's random motions can be rectified by a periodic potential energy landscape that alternates between two states, even if both states are spatially symmetric. If t…
Optimized holographic optical traps
Marco Polin, Kosta Ladavac, Sang-Hyuk Lee +2
Holographic optical traps use the forces exerted by computer-generated holograms to trap, move and otherwise transform mesoscopically textured materials. This article introduces me…
Observation of Flux Reversal in a Symmetric Optical Thermal Ratchet
Sang-Hyuk Lee, Kosta Ladavac, Marco Polin +1
We demonstrate that a cycle of three holographic optical trapping patterns can implement a thermal ratchet for diffusing colloidal spheres, and that the ratchet-driven transport di…