Figure 6: Role of gravity.
From: Helicity-dependent three-dimensional optical trapping of chiral microparticles
Simulated equilibrium position xeq of a chiral microparticle irradiated by two counterpropagating beams as a function of density mismatch between the particle and the host medium. Optical and material parameters are those used in the experiments, except the droplet density that is taken here as the variable quantity. Upper sketch: g is the gravitational acceleration. Plot: solid curves correspond to 3D optical trapping whereas dotted ones refer to 2D trapping of the particle in the (z=0) plane and unstable trapping along z.
