Figure 4: Helicity-dependent 3D optical trapping observations.
From: Helicity-dependent three-dimensional optical trapping of chiral microparticles
(a–e) Snapshots of onion-like chiral liquid crystal droplets optically trapped at origin under power P≈50 mW in situations tagged by the letters A, B, C, D and E in Fig. 3a–e, which, respectively, correspond to w1/R≈0.8, 1.43, 0.59, 0.74 and 1.43. Situations A and B refer to Gaussian beams with Λχ=+1 (a,b), whereas C, D and E refer to first-order Laguerre–Gaussian beams with Λχ=−1 (c–e). For l=0, helicity flip leads to detrapping of the larger droplet (f), whereas the smaller one is kept trapped at the origin (g). For l=1, helicity flip leads to detrapping for both the larger and the smaller droplets (h,j), whereas the droplet with intermediate size remains trapped at the origin (i).
