Optical trapping with optical magnetic field and photonic Hall effect forces.

ABSTRACT: Optical trapping offers robust nanoscale control of matter but, to date, has been dominated by the interaction between a material's electric polarizability, α_e, and the electric part of light, therefore defined by electric-field intensity-gradient forces. Magnetic light-matter interactions, despite their potential to reshape optical trapping research, have remained experimentally unrealized. This paper addresses this long-standing deficiency by realizing optical magnetic field-associated trapping of high-index (i.e., Si) nanoparticles. Experiments, validated by our theoretical framework and Maxwell stress tensor calculations, reveal the essential role of a material's magnetic polarizability, α_m, and electric-magnetic scattering forces arising from the photonic Hall ef

SUBMITTER: Li Y 

PROVIDER: S-EPMC12644684 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature