Observation of Mie scattering from a superconducting micro-particle

A spherical superconducting micro-particle generated by laser ablation in superfluid helium is trapped in a quadrupole magnetic field. Utilizing the property that the particle is isolated in space, observation of the Mie scattering from this particle has been carried out. Analyzing the results, information on the optical properties of superconducting microparticle and their shapes at helium temperature have been deduced.