72 citations · 486 across the 18 of their papers we have counts for
9 papers · 1 filter
Enhanced nonlinear optical effects in drift-biased nonreciprocal graphene plasmonics
S. Ali Hassani Gangaraj, Boyuan Jin, Christos Argyropoulos +1
Nonlinear light-matter interactions are typically enhanced by increasing the local field and its interaction time with matter. Conventional methods to achieve these goals are based…
Chern Invariants of Topological Continua; a Self-Consistent Nonlocal Hydrodynamic Model
Samaneh Pakniyat, S. Ali Hassani Gangaraj, George W Hanson
The bulk-edge correspondence is a fundamental principle of topological wave physics, which states that the difference in gap Chern numbers between the interfaced materials is equal…
Drifting Electrons: Nonreciprocal Plasmonics and Thermal Photonics
S. Ali Hassani Gangaraj, Francesco Monticone
Light propagates symmetrically in opposite directions in most materials and structures. This fact -- a consequence of the Lorentz reciprocity principle -- has tremendous implicatio…
Do Truly Unidirectional Surface Plasmon-Polaritons Exist?
S. Ali Hassani Gangaraj, Francesco Monticone
In this work, we revisit the topic of surface waves on nonreciprocal plasmonic structures, and clarify whether strictly unidirectional surface plasmon-polaritons are allowed to exi…
Robust surface plasmon polaritons on gyrotropic interfaces
Samaneh Pakniyat, Alexander M. Holmes, George W. Hanson +5
Unidirectional surface plasmon polaritons (SPPs) at the interface between a gyrotropic medium and a simple medium are studied in a newly-recognized frequency regime wherein the SPP…
Unidirectional and diffractionless surface plasmon-polaritons on three-dimensional nonreciprocal plasmonic platforms
S. Ali Hassani Gangaraj, George W. Hanson, Mario G. Silveirinha +3
Light-matter interactions in conventional nanophotonic structures typically lack directionality. Furthermore, surface waves supported by conventional material substrates do not usu…
Optical torque on a two-level system near a strongly nonreciprocal medium
S. Ali Hassani Gangaraj, Mário G. Silveirinha, George W. Hanson +2
We investigate the quantum optical torque on an atom interacting with an inhomogeneous electromagnetic environment described by the most general linear constitutive relations. The…
Momentum-Space Topological Effects of Nonreciprocity
S. Ali Hassani Gangaraj, George W. Hanson
The connection between topology and nonreciprocity in photonic systems is reviewed. Topological properties such as Chern number, and momentum-space properties such as Berry phase a…
Coupled Topological Surface Modes in Gyrotropic Structures: Green's Function Analysis
S. Ali Hassani Gangaraj, F. Monticone
At a transition in a wave-guiding structure, part of the incident energy is transmitted and part of the energy is reflected. When the waveguide has non-trivial topological properti…