Spatiotemporal Control of Ultrafast Plasmon Based on Plasmon Response Functions

Abstract

A spectral cross-correlation interferometry, which was combined with a near-field scanning optical microscope, and a cross-correlation dark-field imaging microscope were applied in the spatiotemporal characterization of femtosecond plasmon localized at gold nanostructures, surface plasmon polariton propagated at a plasmon waveguide, and plasmon nano-focusing at a tapered gold tip. Based on the plasmon response functions in both the amplitude and phase obtained from these measurements, the femtosecond plasmon pulse was deterministically tailored by shaping the femtosecond excitation laser pulses