Search Results - "Forouzmand, Ali"
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Tunable all-dielectric metasurface for phase modulation of the reflected and transmitted light via permittivity tuning of indium tin oxide
Published in Nanophotonics (Berlin, Germany) (26-03-2019)“…We propose an electrically tunable metasurface, which can achieve relatively large phase modulation in both reflection and transmission modes (dual-mode…”
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Dynamic beam control via Mie-resonance based phase-change metasurface: a theoretical investigation
Published in Optics express (09-07-2018)Get full text
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Tunable dual-band subwavelength imaging with a wire medium slab loaded with nanostructured graphene metasurfaces
Published in AIP advances (01-07-2015)“…In this paper, we demonstrate that a wire medium slab loaded with graphene-nanopatch metasurfaces (GNMs) enables the enhancement of evanescent waves for the…”
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4
Electro-optical Amplitude and Phase Modulators Based on Tunable Guided-Mode Resonance Effect
Published in ACS photonics (20-11-2019)“…Here, electrically tunable amplitude and phase modulators are designed by the hybridization of indium tin oxide (ITO) into a guided-mode resonance mirror…”
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Real-Time Controllable and Multifunctional Metasurfaces Utilizing Indium Tin Oxide Materials: A Phased Array Perspective
Published in IEEE transactions on nanotechnology (01-03-2017)“…In this paper, two electrically tunable dual-band reflectarray antennas are designed by the integration of a thin layer of indium tin oxide (ITO) into…”
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6
Dynamic beam control via Mie-resonance based phase-change metasurface: a theoretical investigation
Published in Optics express (09-07-2018)“…Here, a non-volatile optically controllable metasurface is theoretically investigated at the operating wavelength of 1.55 μm by utilizing low loss phase-change…”
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Composite Multilayer Shared-Aperture Nanostructures: A Functional Multispectral Control
Published in ACS photonics (18-04-2018)“…There is a growing demand in the field of metasurfaces to design and implement functional multispectral devices capable of complex beam conversion and…”
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Electromagnetic Cloaking of a Finite Conducting Wedge With a Nanostructured Graphene Metasurface
Published in IEEE transactions on antennas and propagation (01-05-2015)“…Here, we present the analytical formulation for the analysis of electromagnetic interaction with a finite conducting wedge covered with a cylindrically shaped…”
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All‐Dielectric C‐Shaped Nanoantennas for Light Manipulation: Tailoring Both Magnetic and Electric Resonances to the Desire
Published in Advanced optical materials (17-07-2017)“…A systematic study is carried out on the interaction of electromagnetic waves with a nonsymmetric all‐dielectric C‐shaped nanoantenna to achieve an ultimate…”
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A Tunable Semiconductor‐Based Transmissive Metasurface: Dynamic Phase Control with High Transmission Level
Published in Laser & photonics reviews (01-06-2020)“…Herein, a tunable semiconductor‐based metasurface, based on electro‐optical modulation of an array of geometrically‐fixed silicon (Si) nanobars, sandwiched…”
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Multi-wavelength voltage-coded metasurface based on indium tin oxide: independently and dynamically controllable near-infrared multi-channels
Published in Optics express (03-02-2020)“…In this paper, we present a design principle for achieving an electrically tunable, multi-wavelength device with multiple functionalities over a single…”
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A Tunable Multigate Indium‐Tin‐Oxide‐Assisted All‐Dielectric Metasurface
Published in Advanced optical materials (05-04-2018)“…In this paper, an optically active reflective metasurface with tunable phase performance is designed which operates based on the excitation of both electric…”
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Model Order Reduction of Large-Scale Metasurfaces Using a Hierarchical Dipole Approximation
Published in ACS photonics (18-01-2017)“…Advances in the field of metasurfaces require simulation of large-scale metasurfaces that extend over many light wavelengths. Adopting standard numerical…”
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14
Excitation of Discrete and Continuous Spectrum in Subdiffraction Wire-Medium Type Lenses
Published in IEEE transactions on antennas and propagation (01-12-2016)“…Subwavelength imaging of the near field of a magnetic line-source excitation is studied for several wire-medium (WM) lens topologies using complex-plane…”
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15
Graphene-loaded wire medium for tunable broadband subwavelength imaging
Published in Physical review. B, Condensed matter and materials physics (03-08-2015)“…In this paper, we demonstrate that a wire medium (WM) slab loaded with graphene sheets enables the enhancement of the near field for subwavelength imaging at…”
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Multifunctional metasurfaces nanoantennas by gate-tunable materials
Published in 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting (01-07-2017)“…Here, advanced approaches based on the concept of gate-tunable materials are presented in order to implement and design novel real-time controllable and…”
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Conference Proceeding -
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Broadband subwavelength imaging with a wire medium slab loaded with graphene sheets
Published in 2015 9th European Conference on Antennas and Propagation (EuCAP) (01-04-2015)“…In this paper, we demonstrate that a wire medium slab loaded with graphene sheets enables the enhancement of the near field for the subwavelength imaging at…”
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Conference Proceeding -
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Cloaking of a conducting finite wedge with graphene nanopatches
Published in 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI) (01-07-2014)“…In this study, an analytic approach is presented for the graphene-based cloaking of conducting finite wedges with an arbitrary angle of opening in the…”
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Conference Proceeding -
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Systematic development of a robust circuit-model technique for subwavelength imaging with wire-medium type lenses
Published in 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting (01-07-2017)“…Here, a general circuit model-based formalism is established to quantify the interaction of electromagnetic waves (both propagating and evanescent waves) with…”
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Conference Proceeding -
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Tunable dual-band subwavelength imaging with a wire medium slab loaded with nanostructured graphene metasurfaces
Published in 2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS) (01-09-2015)“…In this paper, we demonstrate that a wire medium (WM) slab loaded with graphene-nanopatch metasurfaces (GNMs) enables the enhancement of evanescent waves for…”
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Conference Proceeding