Figure 3: Helicity-dependent 3D optical trapping simulations.
From: Helicity-dependent three-dimensional optical trapping of chiral microparticles
(a–d) Existence of 3D trapping in the plane of parameters (w1/R, θ0) depending on the photon helicity for w1=20 μm and l=0, 1, 2 and 3, where the material parameter values are those of our experiments. Three different coloured/hatched regions refer to trapping existence for the cases Λχ=+1 alone, Λχ=−1 alone and Λχ=±1 simultaneously. Letters A, B, C, D and E correspond to the values w1/R≈0.8, 1.43, 0.59, 0.74 and 1.43. (e–h) Partial derivatives of the optical force components at origin per unit power for a beam divergence angle θ0=5°.
