Guanghui Yuan

TL;DR: Plasmonic couplers that overcome limits in the polarization sensitivity of the coupling efficiency and in controlling the directionality of the SPPs are designed and demonstrated using polarization-sensitive apertures in a gold film.

TL;DR: In this article, a novel approach for making reconfigurable optical components that are created with light in a non-volatile and reversible fashion is reported, where components are written, erased and rewritten as two-dimensional binary or greyscale patterns into a nanoscale film of phase-change material by inducing a refractive index-changing phase transition with tailored trains of femtosecond pulses.

TL;DR: Investigation of a mechanism by which metallic particles are attracted and trapped by plasmonic tweezers when surface plasmons are excited and focused by a radially polarized beam in a high-numerical-aperture microscopic configuration finds that it is the sum of both gradient and scattering forces acting in the same direction established by the strong coupling between the metallic particle and the highly focused plAsmonic field.

TL;DR: In this paper, the authors extended the super-oscillation concept into the vectorial-field regime to work with circularly polarized light, and experimentally demonstrated a circularly polarized optical needle with sub-diffraction transverse spot size (0.45l) and axial long depth of focus (DOF) of 15l using a planar SOL at a violet wavelength of 405 nm.

TL;DR: Single-element planar lenses are reported that not only deliver sub-wavelength focusing, thus beating the diffraction limit of conventional refractive lenses, but also focus light of different colors into the same hotspot.