Cylindrical vector beams reveal radiationless anapole condition in a resonant state

Nonscattering optical anapole condition is corresponding to the excitation of radiationless field distributions in open resonators, which offers new degrees freedom for tailoring light-matter interaction. Conventional mechanisms achieving such a relies on sophisticated manipulation electromagnetic multipolar moments all orders guarantee superpositions suppressed moment strengths at same wavelength. In contrast, here we report hidden resonant state Si nanoparticle utilizing tightly focused radially polarized (RP) beam. The coexistence magnetic and wavelength further enables triggering by azimuthally (AP) beam whose electric multipole coefficient could be zero. As result, high contrast inter-transition between ideal scattering can achieved experimentally visible spectrum. proposed mechanism general realized different types nanostructures. Our results showcase that unique combination structured light Mie resonances provide interaction, might shed functional meta-optics.