Thin Light Tube Formation by Tightly Focused Azimuthally Polarized Light Beams

Subwavelength Gratings for Generating Azimuthally Polarized Beams

We have experimentally investigated two binary subwavelength grating-miсropolarizers that transform linearly polarized light to the azimuthally polarized beam. The first miсropolarizer operates in reflective mode (for wavelength 532 nm) and was manufactured in a gold film. The second micropolarizer operates in transmitting mode (for wavelength 633 nm) and was manufactured in silicon.

Coherent anti-Stokes Raman scattering microscopy using tightly focused radially polarized light.

We report a radially polarized coherent anti-Stokes Raman scattering (RP-CARS) microscopy for facilitating longitudinally oriented molecules detection. We observe that under tight focusing of radially polarized pump and Stokes light fields with a high-NA objective, RP-CARS radiation from molecules oriented along the longitudinal direction is approximately threefold stronger than that using line...

Thin-film devices for polarized light- introduction

Surface plasmon interference excited by tightly focused laser beams.

We show that interfering surface plasmon polaritons can be excited with a focused laser beam at normal incidence to a plane metal film. No protrusions or holes are needed in this excitation scheme. Depending on the axial position of the focus, the intensity distribution on the metal surface is either dominated by interferences between counterpropagating plasmons or by a two-lobe pattern charact...

Shaping a Subwavelength Needle with Ultra-long Focal Length by Focusing Azimuthally Polarized Light

Flat optics, which could planarize and miniaturize the traditional optical elements, possesses the features of extremely low profile and high integration for advanced manipulation of light. Here we proposed and experimentally demonstrated a planar metalens to realize an ultra-long focal length of ~240λ with a large depth of focus (DOF) of ~12λ, under the illumination of azimuthally polarized be...