Thorlabs’ Liquid Crystal Polymer (LCP) Vortex Retarders are half-wave retarders designed to affect the radial and azimuthal polarization of optical fields. A vortex retarder has a constant retardance across the clear aperture but its fast axis rotates continuously over the area of the optic. Thes...
(Thorlabs). For ICG, the excitation laser was an 808 nm laser diode at a power density of ~70 mW cm−2, and emission was collected with 1300-nm long-pass filter (Thorlabs). Images and movies were processed with the LightField imaging software 6.11 and MATLAB R2015b. The ...