Optical Singularity Dynamics and Spin-Orbit Interaction due to a Normal-Incident Optical Beam Reflected at a Plane Dielectric Interface

Near complete spin-to-orbital angular momentum conversion in a focused-reflected beam of light

“…[15][16][17][18] The orientation of the forklet is indicative to the handedness of the input circular polarization, as shown in Fig. (5). The forklet orientation changes depending on the RCP or LCP input light due to phase flip.…”

“…The setup used for both simulation and experiment to generate high-quality OVB for circularly polarized input beam and to measure its SoP and ascertain the presence of phase singularity is shown in Fig. (5). The first pair of polarization components, polarizer P1, and quarter wave plate Q1 (P1-Q1) at the input are used to generate circularly polarized beam, and the second pair of polarizer P2 and QWP Q2 (P2-Q2) at the output are used to cross-filter the SoP of the reflected beam to observe its intensity profile using the CCD camera.…”

“…We recently proposed, simulated and experimentally demonstrated generation of OVB by reflecting weaklydiverging paraxial beam of light normally incident at a plane dielectric interface. 5 The availability of complete field information of the incident and reflected beam-field allowed us to investigate in detail the polarization inhomogeneity of the entire beam and the beam dynamics. Instead of a diverging beam one can carry out the experiment in an equivalent optical configuration using a converging light beam.…”