3 papers
physics.optics2025
Generic Optical Singularities in Brewster-reflected Post-paraxial Beam-fields
Anirban Debnath, Nirmal K. Viswanathan
Brewster-reflection of a post-paraxial optical beam at a plane dielectric interface unravels fundamentally significant optical singularity dynamics. We express the simulated field-…
physics.optics2024
Orbital Angular Momenta and Geometric Phase Characteristics of Spin-polarized Components of a General Paraxial Beam-field
Anirban Debnath, Nirmal K. Viswanathan
We explore a subtle and fundamental nature of spin-orbit interaction (SOI) in a general paraxial beam-field by mathematically characterizing the orbital angular momentum (OAM) flux…
physics.optics2024
Complex far fields and optical singularities due to propagation beyond tight focusing: combined effects of wavefront curvature and aperture diffraction
Nitish Kumar, Anirban Debnath, Nirmal K. Viswanathan
All optical systems, which involve the collimation of a reflected, transmitted or scattered wave subsequent to tight focusing, are subject to two kinds of deviations. One is the wa…