Results 161 to 170 of about 839,323 (288)

Array antenna with series-fed configuration providing high radiation performances for automotive radar in IoT applications. [PDF]

Sci Rep
Zakeri H, Parvaneh M, Moradi G, Alibakhshikenari M, Virdee BS, Dalarsson M.   +5 more
europepmc   +1 more source

Photoluminescent Color Centers on a Mainstream Silicon Photonic Foundry Platform

Advanced Optical Materials, EarlyView.
Silicon photonic chips route and process light efficiently but are inherently inefficient at generating it. Here, bright light‐emitting defects, W‐centers, are written into the silicon layer of finished chips from a mainstream commercial foundry: high‐energy ions are implanted straight through the protective oxide and activated by a 250∘C$^\circ{\rm C}$
Prosper Dellah Allo, A. Aadhi, Amirhossein Mosaddegh Yengejeh, Hazel Bakajsza, Mirabel N. M. Mensah, Marcus Tamura, Bhavin J. Shastri, Alexander N. Tait   +7 more
wiley   +1 more source

Low-profile metasurface-backed wideband antenna array for mm-wave applications. [PDF]

Sci Rep
Kiani SH, Rafique U, Shoaib N, Abbasi MI, Elmannai H, Ibrahim MI, Dalarsson M.   +6 more
europepmc   +1 more source

Sub‐Diffraction and Irreversibly Tunable Imaging With Potato Starch Lenses

Advanced Optical Materials, EarlyView.
Native potato starch granules function as sustainable birefringent microlenses that enable polarization‐controlled conventional and vortex lensing via spin‐to‐orbital angular momentum conversion. They provide sub‐diffraction and spiral‐contrast imaging, support vortex‐array generation with controllable topological‐charge sign, exhibit irreversible ...
Petr Bouchal, Jiří Liška, Petr Viewegh, Radim Chmelík, Tomáš Šikola, Zdeněk Bouchal   +5 more
wiley   +1 more source

An Adaptive Grouping Method for Efficient Multi-Beam Testing of Phased Arrays. [PDF]

Sensors (Basel)
Yan C, Zheng J, Gao H, Chen X.
europepmc   +1 more source

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

Advanced Optical Materials, EarlyView.
A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio, Giulio Carotta, Lorenzo Lavista, Andrea Camposeo, Giacomo Venturi, Agnese Guernieri, Alessandro Pitanti, Simon A. R. Horsley, Giuseppe C. La Rocca, Alessandro Tredicucci, Simone Zanotto   +10 more
wiley   +1 more source

Dual Polarization 2 × 2 Array Ku-Band Antenna with Improved Polarization Purity. [PDF]

Sensors (Basel)
Lee TH, Nam H, Seo J, Lee S, Hong K, Pyo S.   +5 more
europepmc   +1 more source

Understanding Inhomogeneous Crystallization Dynamics of Phase‐Change Materials in the Vicinity of Metallic Nanoantennas

Advanced Optical Materials, EarlyView.
Metallic dimer antennas on top of the phase‐change material Ge3Sb2Te6 are addressed with laser pulses, resulting in inhomogeneous crystallization. A self‐consistent multiphysics model is employed to simulate the crystallization and to understand the resulting shift of the antenna resonance.
Luis Schüler, Lukas Conrads, Yingfan Chen, Lina Jäckering, Sebastian Meyer, Matthias Wuttig, Thomas Taubner, Dmitry N. Chigrin   +7 more
wiley   +1 more source

Mutual Coupling Reduction Between Patch Antennas Using Shorting Pin. [PDF]

Micromachines (Basel)
Li J, Zhang J, Fan M, Shi J, Yang WW, Zhang L, Li J, Shao C, Xu K.   +8 more
europepmc   +1 more source

Breaking Optical Transparency and Electromagnetic Performance Trade‐Offs for Transparent Reflective Metasurfaces

Advanced Optical Materials, EarlyView.
A theory‐guided magnetoelectric metasurface design breaks the conventional optical transparency and electromagnetic performance trade‐offs. By preserving the electric and magnetic current paths required for efficient reflection through fine‐metal‐line structure, the developed transparent reflective metasurface achieves high optical transparency without
Mina Feizi, Shu‐Lin Chen, Geng‐Bo Wu, Li‐Zhao Song, Pei‐Yuan Qin, Y. Jay Guo   +5 more
wiley   +1 more source