Results 71 to 80 of about 38,934 (253)

Engineering Metamaterials and Photonic Crystals in the Microwave Regime: from Superlensing to Slow-Light [PDF]

, 2009
The following work involves the study of electromagnetic properties at the microwave frequency range of a class of materials called Metamaterials. A metamaterial is an artificial composite material that exhibits an electromagnetic response unlike any ...
Savo, Salvatore
core   +1 more source

Nanoscale Spatial Tuning of Superconductivity in Cuprate Thin Films via Direct Laser Writing

Advanced Functional Materials, EarlyView.
Maskless direct laser writing enables local control of oxygen stoichiometry in epitaxial YBCO thin films under ambient conditions. Sub‐micrometer grayscale patterns with tunable optical response and superconducting transport properties are achieved.
Irene Biancardi, Valerio Levati, Jordi Alcalà, Thomas Günkel, Nicolas Lejeune, Riccardo Girelli, Alejandro V. Silhanek, Valeria Russo, Narcís Mestres, Daniela Petti, Anna Palau, Edoardo Albisetti   +11 more
wiley   +1 more source

Two‐Photon Grayscale Lithography (2GL) of High Mechanical and Optical Quality 3D Silica Glass Microstructures

Advanced Functional Materials, EarlyView.
Two‐photon grayscale lithography (2GL) enables high‐speed and precise 3D printing of thermolyzed silica glass microstructures with optical‐grade surface quality, high quality factors, and mechanical strength utilizing a custom‐made pre‐glass resist based on polyhedral oligomeric silsesquioxane (POSS) modified with a high‐sensitivity Norrish type II ...
Jonathan L. G. Schneider, Jiajie Liang, Paul Somers, Martin Wegener, Jens Bauer   +4 more
wiley   +1 more source

Ballistic metamaterials

Optica, 2020
We report the theoretical prediction and experimental realization of the optical phenomenon of “ballistic resonance.” This resonance, resulting from the interplay between free charge motion in confining geometries and periodic driving electromagnetic fields, can be utilized to achieve negative permittivity at frequencies well above the bulk plasma ...
Kun Li, Evan Simmons, Andrew F. Briggs, Seth R. Bank, Daniel Wasserman, Viktor A. Podolskiy, Evgenii E. Narimanov   +6 more
openaire   +2 more sources

Transformation-Invariant Metamaterials [PDF]

Physical Review Letters, 2019
The fundamental semiconductor concept of doping has recently been transplanted to photonics in the platform of epsilon-near-zero (ENZ) media. By doping nonmagnetic impurities, ENZ media can exhibit almost arbitrary magnetism. However, this original photonic doping approach results only in isotropic media and thus cannot achieve impedance matching for ...
Youming Zhang, Yu Luo, J. B. Pendry, Baile Zhang   +3 more
openaire   +3 more sources

Trapped-modes, slow light and collective resonances in metamaterials

, 2009
A new class of metamaterials exhibiting coherent, collective response has been introduced. It is shown that the sharp resonant behaviour of coherent metamaterials can only be observed in arrays of metamaterial elements and is absent from the response of ...
Papasimakis, Nikitas
core   +1 more source

One-dimensional chirality : strong optical activity in epsilon-near-zero metamaterials [PDF]

, 2015
A. C. and C. R. thank the U.S. Army International Technology Center Atlantic for financial support (Grant No. W911NF-14-1-0315). A. D. F. acknowledges support from EPSRC (EP/I004602/1 and EP/J004200/1).We suggest that electromagnetic chirality, generally
Rizza, C., Rizza C., Ciattoni A., Di Falco, A., Di Falco A., Scalora M., Scalora, M., Ciattoni, A.   +7 more
core   +1 more source

Load Distributing Metamaterials Via Discrete Optimization

Advanced Functional Materials, EarlyView.
Mechanical metamaterials are computationally optimized to homogenize transmitted forces by minimizing the spread of reaction forces. The resulting architectures transform localized loading into broader, more uniform force distributions and experimentally demonstrate robust load spreading under quasi‐static and impact loading.
Andrea Detry, Hannes Holey, Raja Zulkarnain, Roberto Guerra, Ilaria Papa, Michael Zaiser, Stefano Zapperi   +6 more
wiley   +1 more source

Numerical investigation of Fano resonances in metamaterials with electric asymmetry [PDF]

, 2011
The excitation of high quality factor asymmetric Fano-type resonances on a double layer metafilm structure is investigated through numerical simulation. The paper demonstrates that it is possible to design simple structures capable to sustain a very high
Rotaru, Mihai, Rotaru, M., Sykulski, Jan K., J.K. Sykulski, Sykulski, J.K., M. Rotaru   +5 more
core   +2 more sources

Architecture‐Driven Functional Coupling in Vertically Aligned Nanocomposites

Advanced Functional Materials, EarlyView.
Vertically aligned nanocomposites define a growth‐engineered architecture in which vertical interfaces, strain fields, defect pathways, and phase connectivity are created simultaneously. This review shows how these architectural features couple ferroic, optical, ionic, electrochemical, and device responses, establishing design rules and open challenges
Md Shatil Islam‐Shanto, Javier Zamudio‐García, Abraham Sánchez‐Caballero, David Marrero‐López, Vincenzo Esposito   +4 more
wiley   +1 more source