Optical computation of divergence operation for vector field
arXiv:2003.10649 · doi:10.1103/PhysRevApplied.14.034013
Abstract
Topological physics desires stable methods to measure the polarization singularities in optical vector fields. Here a periodic plasmonic metasurface is proposed to perform divergence computation of vectorial paraxial beams. We design such an optical device to compute spatial differentiation along two directions, parallel and perpendicular to the incident plane, simultaneously. The divergence operation is achieved by creating the constructive interference between two derivative results. We demonstrate that such optical computations provide a new direct pathway to elucidate specific polarization singularities of vector fields.
arXiv comment6 pages, 4 figures
References in corpus (16)
- Ultrahigh electron mobility in suspended graphene
- Resonantly Trapped Bound State in the Continuum Laser
- Graphene Plasmonics: Challenges and Opportunities
- Topological nature of bound states in the radiation continuum
- Drude Conductivity of Dirac Fermions in Graphene
- Generalized spatial differentiation from spin Hall effect of light
- Observation of optical vortices in momentum space
- A Photonic Crystal Slab Laplace Differentiator
- High-index dielectric metasurfaces performing mathematical operations
- Analog Computing Using Graphene-based Metalines
- Singularities and Poincaré Indexes of Electromagnetic Multipoles
- Analog Optical Computing Based on Dielectric Meta-reflect-array
- Analog computing by Brewster effect
- Generalized Optical Signal Processing Based on Multi-Operator Metasurfaces Synthesized by Susceptibility Tensors
- Optical phase mining by adjustable spatial differentiator
- On-grating graphene surface plasmons enabling spatial differentiation in terahertz region