Optical confinement and alignment of dielectric and metallic nanorod in single polarised scalar and vector Gaussian beam

摘要

We present a theoretical analysis of behaviour of dielectric and metallic nanorod placed in a single linearly polarised Gaussian beam in both scalar and vector descriptions. Comparison with experimental observations done before reveals that only vector field description can explain the trapping of gold nanorods near its longitudinal plasmon resonance wavelength.