7 papers
Electromagnetic wave propagation in static black hole spacetimes: an effective refractive index description in Schwarzschild geometry
Abdullah Guvendi, Omar Mustafa Semra Gurtas Dogan, Hassan Hassanabadi
We investigate electromagnetic wave propagation in static, spherically symmetric black hole spacetimes using a covariant and gauge-invariant framework based on the established Maxw…
Scalar-Wave Signatures of Wormholes in Dark Matter Halos
Abdullah Guvendi, Omar Mustafa, Semra Gurtas Dogan +2
We identify scalar-wave signatures of massless fields propagating in static, spherically symmetric wormholes embedded within realistic dark matter halos. Starting from a general li…
Geometric and wave optics in a BTZ optical metric-based wormhole
Semra Gurtas Dogan, Abdullah Guvendi, Omar Mustafa
We investigate the geometric and wave optical properties of a -dimensional ultra-static spacetime conformally related to the static BTZ black hole, characterized by constant…
Optics in spiral dislocation spacetime: Torsion as a geometric waveguide and frequency-filtering mechanism
Semra Gurtas Dogan, Omar Mustafa, Abdullah Guvendi +1
We present an exact analytical investigation of null trajectories and scalar wave propagation in a -dimensional spacetime containing a spiral dislocation-a topological defec…
Twist-Induced Effects on Weyl Pairs in Magnetized Graphene Nanoribbons
Semra Gurtas Dogan, Kobra Hasanirokh, Omar Mustafa +1
This paper presents an analytical investigation into the dynamics of Weyl pairs within magnetized helicoidal graphene nanoribbons. By embedding a curved surface into flat Minkowski…
Ray geodesics and wave propagation on the Beltrami surface: Optics of an optical wormhole
Semra Gurtas Dogan, Abdullah Guvendi, Omar Mustafa
This study investigates ray geodesics and wave propagation on the Beltrami surface, with a particular emphasis on the effective potentials governing photon dynamics. We derive the…