50 citations · 408 across the 24 of their papers we have counts for
24 papers
Exploring Spectral Singularities and Topological Lasers in PT-Symmetric Weyl Semimetals
Arda Sevinc, Rama Alassadi, Mustafa Sarisaman
This paper investigates the unique properties of PT-symmetric Topological Weyl Semimetals (TWS) within the framework of non-Hermitian physics, focusing on their potential for gener…
Charge-pseudospin coupled diffusion in semi-Dirac graphene: pseudospin assisted valley transport
Saber Rostamzadeh, Mustafa Sarisaman
Modifying the hexagonal lattices of graphene enables the repositioning and merging of the Dirac cones which proves to be a key element in the use of these materials for alternative…
Tilt induced vortical response and mixed anomaly in inhomogeneous Weyl matter
Saber Rostamzadeh, Sevval Tasdemir, Mustafa Sarisaman +2
We propose a non-dissipative transport effect and vortical response in Weyl semimetals in the presence of spatial inhomogeneities, namely a spatially varying tilt of the Weyl cones…
Spectral singularities and tunable slab lasers with 2D material coating
Hamed Ghaemi-Dizicheh, Ali Mostafazadeh, Mustafa Sarisaman
We investigate linear and nonlinear spectral singularities in the transverse electric and transverse magnetic modes of a slab laser consisting of an active planar slab sandwiched b…
Broadband and Wide-Angle Invisibility with PT-Symmetric 2D-Weyl Semimetal
Mustafa Sarisaman, Murat Tas
Inspired by the magnificent features of two-dimensional (2D) materials which aroused much of the interest in recent materials science research, we study PT-symmetric 2D Weyl semime…
Broadband Coherent Perfect Absorber with PT-Symmetric 2D-Materials
Mustafa Sarisaman, Murat Tas
We suggest graphene and a two-dimensional (2D) Weyl semimetal (WSM) as 2D materials for the realization of a broadband coherent perfect absorber (CPA) respecting overall PT-symmetr…
Lasing with Topological Weyl Semimetal
Güneş Oktay, Mustafa Sarisaman, Murat Tas
Lasing behavior of optically active planar topological Weyl semimetal (TWS) is investigated in view of the Kerr and Faraday rotations. Robust topological character of TWS is reveal…
-Symmetric Coherent Perfect Absorber with Graphene
Mustafa Sarisaman, Murat Tas
We investigate -symmetric coherent perfect absorbers (CPAs) in the TE mode solution of a linear homogeneous optical system surrounded by graphene sheets. It is reveal…
Unidirectional Invisibility and PT-Symmetry with Graphene
Mustafa Sarisaman, Murat Tas
We investigate the reflectionlessness and invisibility properties in the transverse electric (TE) mode solution of a linear homogeneous optical system which comprises the $\mathcal…
Spectral Singularities, Threshold Gain, and Output Intensity for a Slab Laser with Mirrors
Keremcan Doğan, Ali Mostafazadeh, Mustafa Sarısaman
We explore the consequences of the emergence of linear and nonlinear spectral singularities in TE modes of a homogeneous slab of active optical material that is placed between two…
Nonlinear Spectral Singularities and Laser Output Intensity
Hamed Ghaemi-Dizicheh, Ali Mostafazadeh, Mustafa Sarisaman
The mathematical notion of spectral singularity admits a description in terms of purely outgoing solutions of a corresponding linear wave equation. This leads to a nonlinear genera…
Unidirectional reflectionlessness and invisibility in the TE and TM modes of a PT-symmetric slab system
Mustafa Sarisaman
Unidirectional invisibility of a PT-symmetric optical system is of great interest, but challenging as well since it is infeasible to fulfill it through wide optical frequency range…
Spectral Singularities in the TE and TM modes of a PT-Symmetric Slab System: Optimal conditions for realizing a CPA-Laser
Ali Mostafazadeh, Mustafa Sarisaman
Among the interesting outcomes of the study of the physical applications of spectral singularities in PT-symmetric optical systems is the discovery of CPA-lasers. These are devices…
Lasing Threshold Condition for Oblique TE and TM Modes, Spectral Singularities, and Coherent Perfect Absorption
Ali Mostafazadeh, Mustafa Sarisaman
We study spectral singularities and their application in determining the threshold gain coefficient for oblique transverse electric/magnetic (TE/TM) modes of an infinit…
Spectral Singularities in the Surface Modes of a Spherical Gain Medium
Ali Mostafazadeh, Mustafa Sarisaman
We study the surface modes of a homogeneous spherical gain medium and provide a comprehensive analytic treatment of a special class of these modes that support spectral singulariti…
Spectral Singularities and Whispering Gallery Modes of a Cylindrical Gain Medium
Ali Mostafazadeh, Mustafa Sarisaman
Complex scattering potentials can admit scattering states that behave exactly like a zero-width resonance. Their energy is what mathematicians call a spectral singularity. This phe…
Optical Spectral Singularities and Coherent Perfect Absorption in a Two-Layer Spherical Medium
Ali Mostafazadeh, Mustafa Sarisaman
An optical spectral singularity is a zero-width resonance that corresponds to lasing at threshold gain. Its time-reversal causes coherent perfect absorption of light and forms the…
Euclidean Pseudoduality and Boundary Conditions in Sigma Models
Mustafa Sarisaman
We discuss pseudoduality transformations in two dimensional conformally invariant classical sigma models, and extend our analysis to a given boundaries of world-sheet, which gives…
Spectral Singularities of a Complex Spherical Barrier Potential and Their Optical Realization
Ali Mostafazadeh, Mustafa Sarisaman
The mathematical notion of a spectral singularity admits a physical interpretation as a zero-width resonance. It finds an optical realization as a certain type of lasing effect tha…
Pseudoduality and Complex Geometry in Sigma Models
Mustafa Sarisaman
We study the pseudoduality transformations in two dimensional N = (2, 2) sigma models on Kähler manifolds. We show that structures on the target space can be transformed into the p…
Pseudoduality in Supersymmetric Sigma Models on Symmetric Spaces
Mustafa Sarisaman
We discuss the target space pseudoduality in supersymmetric sigma models on symmetric spaces using two different methods, orthonormal coframe and component expansion. These two met…
Pseudoduality in Supersymmetric Sigma Models
Mustafa Sarisaman
We study the pseudoduality transformation in supersymmetric sigma models. We generalize the classical construction of pseudoduality transformation to supersymmetric case. We perfor…
Pseudoduality Between Symmetric Space Sigma Models
Mustafa Sarisaman
We study the pseudoduality transformation on the symmetric space sigma models. We switch the Lie group valued pseudoduality equations to Lie algebra valued ones, which leads to an…
Pseudoduality and Conserved Currents in Sigma Models
Mustafa Sarisaman
We discuss the current conservation laws in sigma models based on a compact Lie groups of the same dimensionality and connected to each other via pseudoduality transformations in t…