Research on spin-orbit interactions in evanescent fields is crucial as it could revolutionize particle manipulation using light. This research, led by Dr Jinsheng Lu and published in Physical Review Letters, has uncovered a new kind of optical force that relies on the polarization of the incoming light or the particle being manipulated. We examined these phenomena in a microfiber-microcavity system with whispering gallery mode resonances, allowing for a clearer understanding and unification of polarization-dependent forces. Our findings challenge previous studies and suggest a...