A simple plasmonic nanostructure is designed to allow polarization‐sensitive directional steering of surface plasmon polaritons (SPPs). Based on crossed Babinet‐inverted nanoantennas, steering of SPPs in the full first quadrant with high sensitivity to the linear polarization of the monochromatic exciting source is numerically and experimentally demonstrated. The same device could also function as a polarization‐driven power‐splitter.
We demonstrate for the first time, second-harmonic generation (SHG) is allowed through the control of optical modal asymmetry rather than breaking the symmetry of material or geometry. Our idea is realized through a plasmonic two-wire transmission-line. As compared to other SHG using surface plasmon polaritons, our second-harmonic signal remains guided.
Talbot self-imaging extended to azimuthal angle for the first time.
Jeff and Valley discovered a novel way to create optical near-field vortices using linearly-polarized laser excitation!
Danny’s mode conversion paper in a plasmonic two-wire transmission-line published in Nano Letters.