Browsing by Author "Kurt, Hamza"
Now showing items 1-10 of 10
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Angular filtering by Bragg photonic microstructures fabricated by physical vapour deposition
(2019-07-01)
Article
Open AccessWe propose and experimentally demonstrate spatial filtering by photonic crystals in a Bragg configuration. Compared to the Laue configuration, where spatial filtering was already demonstrated before, the Bragg configuration ... -
Asymmetric light transmission effect based on an evolutionary optimized semi-Dirac cone dispersion photonic structure
(American Physical Society (APS), 2018-12-10)
Article
Open AccessIn this paper, we present the numerical and experimental demonstration of asymmetric light transmission by a compact photonic crystal (PC) structure, which sustains semi-Dirac cone dispersion. The semi-Dirac point is ... -
Asymmetric light transmission in PT-Symmetric microring resonators
(2016-03-15)
Article
Restricted access - publisher's policyWe propose a new type of add-drop microring resonator made of gain and loss materials. Microring resonators are compact, narrow band, and optical channel dropping filters. In such linear systems, light transmission to ... -
Directionality fields generated by a local Hilbert transform
(American Physical Society, 2018-03-15)
Article
Open AccessWe propose an approach based on a local Hilbert transform to design non-Hermitian potentials generating arbitrary vector fields of directionality, ¿p(¿r), with desired shapes and topologies. We derive a local Hilbert ... -
Invisibility on demand based on a generalized Hilbert transform
(American Physical Society (APS), 2018-07-12)
Article
Open AccessWe propose a feasible invisibility approach to suppress the scattering of waves from or to given directions and for particular frequencies, i.e., invisibility on demand. We derive a generalized Hilbert transform for a ... -
Mid-infrared T-shaped photonic crystal waveguide for optical refractive index sensing
(2017-06-01)
Article
Open AccessIn this paper, we propose and design a new type of an integrated optical sensor that performs sensing in a wide wavelength range corresponding to mid-infrared (mid-IR) spectrum. By engineering the structural parameters of ... -
Nanostructured multilayer coatings for spatial filtering
(2021-03-16)
Article
Open AccessSpatial 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 for intracavity spatial filtering. Such ... -
Numerical and experimental demonstration of a wavelength demultiplexer design by point-defect cavity coupled to a tapered photonic crystal waveguide
(2016-01-01)
Article
Open AccessWe propose and experimentally demonstrate a demultiplexer with point-defect resonators and a reflection feedback mechanism in a photonic crystal waveguide (PCW). A tapered PCW has been chosen as the necessary reflector, ... -
Polarization-independent broadband bidirectional optical cloaking using a new type of inverse scattering approach
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Open AccessSince the advent of transformation optics a decade ago [1], the ability to achieve optical cloaking has become a matter of practical realization. However, so far extreme material requirements and large device areas have ... -
Rainbow trapping in a chirped three-dimensional photonic crystal
(Macmillan Publishers, 2017-06-08)
Article
Open AccessLight localization and intensity enhancement in a woodpile layer-by-layer photonic crystal, whose interlayer distance along the light propagation direction is gradually varied, has been theoretically predicted and ...
