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Ayad M.A.,American University in Cairo | Obayya S.S.A.,Center for Photonics and Smart Materials | Swillam M.A.,American University in Cairo
Journal of Lightwave Technology | Year: 2014

A novel design of a submicron power splitter is presented using plasmonics with the metal insulator metal (MIM) configuration. A simple analytical model is utilized to obtain good initial design. The final optimized design is obtained using finite-difference time domain based optimization. The proposed approach provides a simple and efficient methodology for designing 1xN power splitters using MIM configuration. The proposed power splitters are ultra wide band(~ 2 μm) with negligible imbalance. The approach is utilized to design up to 1 × 4, 1 × 8, and 1 × 16 integrated power splitters with submicron footprint, where all the optimized designs are validated. © 1983-2012 IEEE. Source


Areed N.F.F.,Mansoura University | Obayya S.S.A.,Center for Photonics and Smart Materials
IEEE Photonics Technology Letters | Year: 2013

A novel design of an easily and fully integrated terabit per second (Tbit/s) optical router is presented and analyzed using the finite difference time domain method. The proposed router consists of three photonic bandgap (PBG) waveguides with two nematic liquid crystal (NLC) layers. The suggested device can be used to divert the light beam to one of the three photonic crystal waveguides based on the biasing states of the two NLC layers. In this way, there are three different modes of operation where each one is used for routing data to the required direction. The suggested device offers crosstalk of 19 dB. In addition, the reported structure opens up the revenue for building multi-port optical routers through the use of a number of appropriately positioned NLC layers within the platform of PBG structure. © 1989-2012 IEEE. Source


Hameed M.F.O.,Mansoura University | Hameed M.F.O.,Center for Photonics and Smart Materials | Obayya S.S.A.,Center for Photonics and Smart Materials
Optics Letters | Year: 2014

In this Letter, an ultra-compact polarization rotator (PR) based on silica photonic crystal fiber with liquid crystal core is introduced and analyzed using full-vectorial finite difference approaches. The analyzed parameters of the suggested PR are the conversion length, modal hybridness, power conversion and crosstalk. In addition, the fabrication tolerance analysis of the reported design is investigated in detail. The proposed PR has an ultra-compact device length of 4.085 μm and an almost 100% polarization conversion ratio. © 2014 Optical Society of America. Source


Heikal A.M.,Center for Photonics and Smart Materials | Heikal A.M.,University of South Wales | Hameed M.F.O.,Center for Photonics and Smart Materials | Hameed M.F.O.,Mansoura University | Obayya S.S.A.,Center for Photonics and Smart Materials
Journal of Lightwave Technology | Year: 2013

In this paper, the modal analysis of a novel design of three trenched single mode channel plasmon polariton is introduced and analyzed using the full-vectorial finite difference method for linear oblique and curved interfaces (FVFD-LOCI). The analyzed parameters are the real effective index, propagation length, and lateral mode radius r3dB. In addition, the figure of merit (FOM) defined as the ratio between propagation length and lateral mode radius is also studied. The analysis is performed for different channel plasmon polariton (CPP) waveguides; trenched-groove, V-groove and the suggested three trenched structure over a specific spectral range (200-550 THz). The selected band of frequency is chosen to ensure the existence of the CPP fundamental mode. The reported design offers very high FOM at low frequency band (200-350 THz) compared to the well known V-groove structure. However, the lateral mode radius r3dB of the suggested three trenched structure is slightly smaller than that of the V-groove structure. For high frequency band (350-550 THz), the FOM is still higher than that of the V-groove structure while the lateral mode radius r3dB is slightly greater than that of the V-groove structure. © 1983-2012 IEEE. Source


Heikal A.M.,Center for Photonics and Smart Materials | Heikal A.M.,University of South Wales | Hameed M.F.O.,Center for Photonics and Smart Materials | Hameed M.F.O.,Mansoura University | Obayya S.S.A.,Center for Photonics and Smart Materials
IEEE Journal of Quantum Electronics | Year: 2013

In this paper, the modal analysis of a novel design of a hybrid long-range plasmonic waveguide is introduced and analyzed using the full-vectorial finite difference method. The suggested design has high index material as a cap to reduce the propagation loss and optimum bending radius as well. The analyzed parameters are the real effective index and propagation loss. In addition, the bending analysis of the reported design is introduced. The coupling is performed between three different waveguides: straight dielectric waveguide, straight hybrid long-range plasmon waveguide, and uniformly bent hybrid one. © 1965-2012 IEEE. Source

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