Radiation Pressure Efficiencies of Spheres Made of Isotropic, Achiral, Passive, Homogeneous, Negative-Phase-Velocity Materials

Electromagnetic fields exert higher radiation pressures over isotropic, achiral, homogeneous, passive spheres made of negative-phase-velocity materials than of positive-phase-velocity materials. The radiation pressure can be very high if a nanoscale sphere has negligible loss, and the real parts of its relative permittivity and/or relative permeability are in the neighborhood of –2.