11 citations · 21 across the 5 of their papers we have counts for
7 papers
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…
Measurement of Orbital Angular Momentum of Light using Stokes Parameters and Barnett's Formalism
Anirban Debnath, Nirmal K. Viswanathan
We present a formalism for experimental determination of the orbital angular momentum (OAM) of a paraxial optical beam-field by intertwining Barnett's formalism and Stokes paramete…
Optical Singularity Dynamics and Spin-Orbit Interaction due to a Normal-Incident Optical Beam Reflected at a Plane Dielectric Interface
Anirban Debnath, Nitish Kumar, Upasana Baishya +1
The degenerate case of normal incidence and reflection of an optical beam (both paraxial and non-paraxial) at a plane isotropic dielectric interface, which is azimuthally symmetric…
Generic Optical Singularities and Beam-field Phenomena due to General Paraxial Beam Reflection at a Plane Dielectric Interface
Anirban Debnath, Nirmal K. Viswanathan
A single paraxial beam reflection at a plane dielectric interface, configured appropriately, can lead to the formation of a polarization singularity in the inhomogeneously polarize…
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…
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-…