Search Results - "Economou, Eleftherios N."

Dielectric Metamaterials with Toroidal Dipolar Response by Basharin, Alexey A., Kafesaki, Maria, Economou, Eleftherios N., Soukoulis, Costas M., Fedotov, Vassili A., Savinov, Vassili, Zheludev, Nikolay I.

“…Toroidal multipoles are the terms missing in the standard multipole expansion; they are usually overlooked due to their relatively weak coupling to the…”
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Experimental Demonstration of Ultrafast THz Modulation in a Graphene-Based Thin Film Absorber through Negative Photoinduced Conductivity by Tasolamprou, Anna C, Koulouklidis, Anastasios D, Daskalaki, Christina, Mavidis, Charalampos P, Kenanakis, George, Deligeorgis, George, Viskadourakis, Zacharias, Kuzhir, Polina, Tzortzakis, Stelios, Kafesaki, Maria, Economou, Eleftherios N, Soukoulis, Costas M

“…We present an experimental demonstration and interpretation of an ultrafast optically tunable, graphene-based thin film absorption modulator for operation in…”
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Pairing Toroidal and Magnetic Dipole Resonances in Elliptic Dielectric Rod Metasurfaces for Reconfigurable Wavefront Manipulation in Reflection by Tsilipakos, Odysseas, Tasolamprou, Anna C., Koschny, Thomas, Kafesaki, Maria, Economou, Eleftherios N., Soukoulis, Costas M.

“…A novel approach for reconfigurable wavefront manipulation with gradient metasurfaces based on permittivity‐modulated elliptic dielectric rods is proposed. It…”
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Combined nano and micro structuring for enhanced radiative cooling and efficiency of photovoltaic cells by Perrakis, George, Tasolamprou, Anna C., Kenanakis, George, Economou, Eleftherios N., Tzortzakis, Stelios, Kafesaki, Maria

“…Outdoor devices comprising materials with mid-IR emissions at the atmospheric window (8–13 μm) achieve passive heat dissipation to outer space (~ − 270 °C),…”
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Giant enhancement of nonreciprocity in gyrotropic heterostructures by Katsantonis, Ioannis, Tasolamprou, Anna C., Koschny, Thomas, Economou, Eleftherios N., Kafesaki, Maria, Valagiannopoulos, Constantinos

“…Nonreciprocity is a highly desirable feature in photonic media since it allows for control over the traveling electromagnetic waves, in a way that goes far…”
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Highly ordered laser imprinted plasmonic metasurfaces for polarization sensitive perfect absorption by Tasolamprou, Anna C., Skoulas, Evangelos, Perrakis, George, Vlahou, Matina, Viskadourakis, Zacharias, Economou, Eleftherios N., Kafesaki, Maria, Kenanakis, George, Stratakis, Emmanuel

“…We present polarization-sensitive gap surface plasmon metasurfaces fabricated with direct material processing using pulsed laser light, an alternative and…”
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Flexible 3D Printed Conductive Metamaterial Units for Electromagnetic Applications in Microwaves by Tasolamprou, Anna C., Mentzaki, Despoina, Viskadourakis, Zacharias, Economou, Eleftherios N., Kafesaki, Maria, Kenanakis, George

“…In this work we present a method for fabricating three dimensional, ultralight and flexible millimeter metamaterial units using a commercial household 3D…”
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Seismic Isolation via I-Shaped and T-Shaped Large-Scale Phononic Metamaterials by Aravantinos-Zafiris, Nikos, Sigalas, Mihail M., Economou, Eleftherios N.

“…In this work, the attenuation of surface seismic waves from large-scale phononic metamaterials is numerically studied. The proposed metamaterials consist of…”
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Scattering Properties of PT-Symmetric Chiral Metamaterials by Katsantonis, Ioannis, Droulias, Sotiris, M. Soukoulis, Costas, N. Economou, Eleftherios, Kafesaki, Maria

“…The combination of gain and loss in optical systems that respect parity–time (PT)-symmetry has pointed recently to a variety of novel optical phenomena and…”
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Meta-Atoms with Toroidal Topology for Strongly Resonant Responses by Tsilipakos, Odysseas, Viskadourakis, Zacharias, Tasolamprou, Anna C, Zografopoulos, Dimitrios C, Kafesaki, Maria, Kenanakis, George, Economou, Eleftherios N

“…A conductive meta-atom of toroidal topology is studied both theoretically and experimentally, demonstrating a sharp and highly controllable resonant response…”
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Passive radiative cooling and other photonic approaches for the temperature control of photovoltaics: a comparative study for crystalline silicon-based architectures by Perrakis, George, Tasolamprou, Anna C., Kenanakis, George, Economou, Eleftherios N., Tzortzakis, Stelios, Kafesaki, Maria

“…The radiative cooling of objects during daytime under direct sunlight has recently been shown to be significantly enhanced by utilizing nanophotonic coatings…”
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Chiral Metamaterials with PT Symmetry and Beyond by Droulias, Sotiris, Katsantonis, Ioannis, Kafesaki, Maria, Soukoulis, Costas M, Economou, Eleftherios N

“…Optical systems with gain and loss that respect parity-time (PT) symmetry can have real eigenvalues despite their non-Hermitian character. Chiral systems…”
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2D-patterned graphene metasurfaces for efficient third harmonic generation at THz frequencies by Theodosi, Anna, Tsilipakos, Odysseas, Soukoulis, Costas M, Economou, Eleftherios N, Kafesaki, Maria

“…Graphene is an attractive two-dimensional material for nonlinear applications in the THz regime, since it possesses high third order nonlinearity and the…”
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Perfect optical absorption with nanostructured metal films: design and experimental demonstration by Perrakis, George, Tsilipakos, Odysseas, Kenanakis, George, Kafesaki, Maria, Soukoulis, Costas M, Economou, Eleftherios N

“…Structuring metal surfaces on the nanoscale has been shown to alter their fundamental processes like reflection or absorption by supporting surface plasmon…”
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Toward Intelligent Metasurfaces: The Progress from Globally Tunable Metasurfaces to Software‐Defined Metasurfaces with an Embedded Network of Controllers by Tsilipakos, Odysseas, Tasolamprou, Anna C., Pitilakis, Alexandros, Liu, Fu, Wang, Xuchen, Mirmoosa, Mohammad Sajjad, Tzarouchis, Dimitrios C., Abadal, Sergi, Taghvaee, Hamidreza, Liaskos, Christos, Tsioliaridou, Ageliki, Georgiou, Julius, Cabellos‐Aparicio, Albert, Alarcón, Eduard, Ioannidis, Sotiris, Pitsillides, Andreas, Akyildiz, Ian F., Kantartzis, Nikolaos V., Economou, Eleftherios N., Soukoulis, Costas M., Kafesaki, Maria, Tretyakov, Sergei

“…Metasurfaces, the ultrathin, 2D version of metamaterials, have recently attracted a surge of attention for their capability to manipulate electromagnetic…”
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Magnetic response of split ring resonators at terahertz frequencies by Soukoulis, Costas M., Koschny, Thomas, Zhou, Jiangfeng, Kafesaki, Maria, Economou, Eleftherios N.

“…We investigate numerically the electric and the magnetic response of the split‐ring resonators (SRRs) for different electromagnetic (EM) field polarization and…”
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Controlling THz and far-IR waves with chiral and bianisotropic metamaterials by Kenanakis, George, Economou, Eleftherios N., Soukoulis, Costas M., Kafesaki, Maria

“…Chiral and bianisotropic metamaterials, where coupling of magnetic and electric phenomena plays an important role, offer advanced possibilities for the control…”
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Three-Dimensional in Vivo Imaging of Green Fluorescent Protein-Expressing T Cells in Mice with Noncontact Fluorescence Molecular Tomography by Garofalakis, Anikitos, Zacharakis, Giannis, Meyer, Heiko, Economou, Eleftherios N., Mamalaki, Clio, Papamatheakis, Joseph, Kioussis, Dimitris, Ntziachristos, Vasilis, Ripoll, Jorge

“…Given that optical tomography is capable of quantitatively imaging the distribution of several important chromophores and fluorophores in vivo, there has been…”
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Squeezing a Prism into a Surface: Emulating Bulk Optics with Achromatic Metasurfaces by Tsilipakos, Odysseas, Kafesaki, Maria, Economou, Eleftherios N., Soukoulis, Costas M., Koschny, Thomas

“…Metasurfaces promise to replace bulky prisms and lenses with 2D surfaces, revolutionizing wavefront control with technologically significant advantages in…”
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Split-cube-resonator-based metamaterials for polarization-selective asymmetric perfect absorption by Tsilipakos, Odysseas, Xomalis, Angelos, Kenanakis, George, Farsari, Maria, Soukoulis, Costas M., Economou, Eleftherios N., Kafesaki, Maria

“…A split-cube-resonator-based metamaterial structure that can act as a polarization- and direction-selective perfect absorber for the infrared region is…”
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