39 citations · 190 across the 20 of their papers we have counts for
21 papers
Curved beam generation and its experimental realization by rectangular prism with asymmetric polynomial back surface
Berkay Neşeli, Hamza Kurt, Mirbek Turduev
With the discovery of self-accelerating beams, possibility of obtaining curved light beams in free space has been realized. These special beams paved the way for many new applicati…
Multi-directional cloak design by all dielectric unit-cell optimized structure
Muratcan Ayik, Hamza Kurt, Oleg V. Minin +2
In this manuscript, we demonstrate the design and experimental proof of an optical cloaking structure which multi-directionally conceals a perfectly electric conductor (PEC) object…
Reinforcement learning enabled the design of compact and efficient integrated photonic devices
Mirbek Turduev, Emre Bor, Onur Alparslan +4
In this paper, we introduce the design approach of integrated photonic devices by employing reinforcement learning known as attractor selection. Here, we combined three-dimensional…
Ultra-compact, high-NA achromatic multilevel diffractive lens via metaheuristic approach
Bumin K. Yildirim, Hamza Kurt, Mirbek Turduev
Recently, the multilevel diffractive lenses (MDLs) have attracted considerable attention mainly due to their superior wave focusing performance; however, efforts to correct the chr…
Nanostructured Multilayer Coatings for Spatial Filtering
Lina Grineviciute, Ceren Babayigit, Darius Gailevičius +6
Spatial filtering is an important mechanism to improve the spatial quality of laser beams. Typically, a confocal arrangement of lenses with a diaphragm in the focal plane is used f…
Inverse design of compact optical cloaks and experimental demonstration at microwave frequencies
Mediha Tutgun, Emre Bor, Mirbek Turduev +1
Inverse design in photonics has gathered increasing attention as a powerful approach that goes beyond the intuition-based designs. In this Letter, we present the inverse design and…
Topological phase transition of the centered rectangular photonic lattice
J. Hajivandi, H. Kurt
A Cm planar photonic material (two-dimensional) including the mirror reflection symmetry is explored where in the Dirac cones appeared at the high-symmetry points of the Brillouin…
Simulating Topological Robustness of Fano Resonance in Rotated Honeycomb Photonic Crystals
J. Hajivandi, E. Kaya, G. Edwards +1
The Fano resonance with a distinctive ultra-sharp, asymmetric line shape and high quality factor Q, is a widely occurring phenomena that has a large variety of optical, plasmonic a…
Topological photonic states and directional emission of the light exiting from the photonic topological structure composed of two dimensional honeycomb photonic crystals with different point group symmetries
J. Hajivandi, H. Kurt
In this work, we investigate a two dimensional honeycomb photonic crystal (2D HPC) with C_6 symmetry point group, which is known to demonstrate a double Dirac cone at k=0 of the Br…
Intensity tuning of the edge states in the imperfect topological waveguides based on the photonic crystals with the C3 point group symmetry
Jamileh Hajivandi, Hasan Pakarzadeh, Hamza Kurt
In this paper, we explore the topological behavior of a two-dimensional honeycomb photonic crystal (PC) based on the presence of double Dirac-cone connected the orbitals p and d, d…
Crossed chiral band approximation for wideband self-collimation of light
Melike Gumus, Onder Akcaalan, Hamza Kurt
We propose a perspective to the evaluation of the wide bandwidth phenomenon, by introducing the band tailoring and chiral band approximation on the self-collimation effect for low-…
Inverse Design of All-dielectric Parallel-Plane Mirror Resonator
Mediha Tutgun, Done Yilmaz, Aydan Yeltik +2
In this study, we used parallel plane mirror resonator analogy to design all-dielectric optical resonator that is performed with the objective-first inverse design algorithm. Confi…
High-performance 2D 1xN T-junction Wavelength (De)Multiplexer Systems by Inverse Design
Yusuf A. Yilmaz, Ahmet M. Alpkilic, Aydan Yeltik +1
Previously proposed designs of integrated photonic devices have used the intuitive brute force approach or optimization methods that employ parameter search algorithms. However, a…
Active beam steering and afocal zooming by nematic liquid crystal infiltrated graded index photonic structures
Ceren Babayigit, Hamza Kurt, Mirbek Turduev
This study presents active beam steering and afocal zooming of light by incorporating liquid crystals (LCs) with graded index photonic crystal (GRIN PC). The GRIN PC structures are…
Reduced Symmetric 2D Photonic Crystal Cavity with Wavelength Tunability
Melike A. Gumus, Mediha Tutgun, Done Yilmaz +1
In this paper, we propose a microcavity supported by a designed photonic crystal structure (PhC) that supplies both tunability of cavity modes and quality factor of cavity. Low sym…
Analytical, numerical and experimental investigation of Luneburg lens system for directional cloaking
Ceren Babayigit, Aydin Sinan Evren, Emre Bor +2
In this study, the design of a directional cloaking based on the Luneburg lens system is proposed and its operating principle is experimentally verified. The cloaking concept is an…
Broadband polarization-independent low-crosstalk metasurface lens array-based mid wave infrared focal plane arrays
Aytekin Ozdemir, Nazmi Yilmaz, Fehim Taha Bagci +2
The miniaturization of pixel is essential for achieving high-resolution, planar, compact-size focal plane arrays (FPAs); however, the resulted increase in the optical crosstalk bet…
All-dielectric self-cloaked structures
Zeki Hayran, Ramon Herrero, Muriel Botey +2
While practical realizations of optical invisibility have been achieved so far by various ingenious methods, they generally rely on complex materials which prevent the wide impleme…
Directionality Fields generated by a Local Hilbert Transform
W. W. Ahmed, R. Herrero, M. Botey +3
We propose a new approach based on a local Hilbert transform to design non-Hermitian potentials generating arbitrary vector fields of directionality, p(r), with desired shapes and…
Invisibility on demand based on a generalized Hilbert transform
Zeki Hayran, Ramon Herrero, Muriel Botey +2
Designing invisible objects without the usage of extreme materials is a long-sought goal for photonic applications. Invisibility techniques demonstrated so far typically require hi…
Rainbow Trapping in a Chirped Three-Dimensional Photonic Crystal
Zeki Hayran, Hamza Kurt, Kestutis Staliunas
Light localization and intensity enhancement in a woodpile layer-by-layer photonic crystal, whose interlayer distance along the propagation direction is gradually varied, has been…