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Theoretical and experimental study on surface modes of low symmetric periodic structures
(IEEE Computer Society, 2017-09)
In this study, surface waves supported at the boundary of two-dimensional all dielectric low-symmetric periodic structures (LSPS) are numerically investigated and experimentally verified in the microwave region. In LSPSs ...
Photonic Crystal Spatial Filters fabricated by Physical Vapour Deposition
(Institute of Electrical and Electronics Engineers Inc., 2019-06)
The idea of the angular, or equivalently - spatial, filtering by photonic crystals (PhCs) is based on a selective diffraction of the light propagating through the double-periodic photonic structure. The angular components ...
Engineering defect modes in symmetry reduced 1D photonic crystal nanobeam waveguide
(IEEE Computer Society, 2017-08)
In this paper, nanobeam cavity studies were performed on low-symmetric 1D photonic crystals. An eligible comparison between low-symmetric structure and a regular cavity is held. Due to nature of the resonance, reduced ...
Polarization independent nanobeam cavity tuning using annular photonic crystals
(SPIE, 2014)
Nanobeam cavity waveguides have drawn great attention of the researchers due to being a useful optical platform for several applications, e. g. optical switching and filtering.1 Almost all of the past studies investigated ...
Partial cloaking by graded index photonic crystals
(SPIE, 2014-04)
Since the first proposal of the idea of optical cloaking, huge research effort has been spent to implement hiding objects. We propose a broad band all-dielectric partial (unidirectional) cloaking device that hides arbitrary ...
Compact rainbow trapping and demultiplexing by photonic crystal waveguides
(Institute of Electrical and Electronics Engineers Inc., 2014)
Graded Index Photonic Crystals (GRIN PhCs) are artificial periodic materials that possess gradually varying effective refractive indices. GRIN profiles can be formed by adjusting the radii or the locations of PhC unit ...
Broadband one way propagation via dielectric waveguides with unequal effective index
(Institute of Electrical and Electronics Engineers Inc., 2014-12)
We present an efficient approach for broad band one way propagation of light by parallel and unequal dielectric waveguides leading different effective phase shifts. Three dimensional numerical simulations show that 30% ...
Enhanced sub-wavelength focusing by tilted and modified graded index medium
(Institute of Electrical and Electronics Engineers Inc., 2014)
The inhomogeneous variation of index distribution as graded index (GRIN) medium focuses light without the curved surfaces. In the current study, we investigate enhanced focusing properties of GRIN medium with tilted front ...
Non-diffraction bloch modes in low-symmetric photonic crystals
(OSA - The Optical Society, 2017)
[No abstract available]
Design of nanobeam cavity with inverse objective-first algorithm
(Institute of Electrical and Electronics Engineers Inc., 2018-06)
The inverse design method has recently been used effectively in the design of nanophotonic devices, since it provides effective optimization of all structural parameters that are not possible with heuristic methods. In ...
