Results 111 to 120 of about 202,998 (281)
Efficient Polarization‐Entangled Photon‐Pair Generation by a Fiber‐In‐Line van der Waals Material
Advanced Science, EarlyView.Telecom‐wavelength polarization‐entangled photon pairs are generated in a van der Waals‐material‐integrated all‐fiber device via spontaneous parametric down‐conversion. The demonstrated fiberized quantum light source bridges emerging 2D nonlinear materials and practical quantum photonic systems, opening new opportunities for scalable fiber‐based ...
Jungseok Choi +11 more
wiley +1 more source
Comparison of two planar elliptical ultra-wideband PPy conductive polymer antennas
, 2012 Conductive polymers are a new type of conductive materials that are attractive for application in flexible, and possibly reconfigurable antennas. Two planar elliptical ultra-wideband antennas based on conductive polymers are manufactured.
Kaufmann, T. +9 more
core +1 more source
Advanced Science, EarlyView.Inspired by the intricate microstructure of cicada wings, researchers developed a novel in situ skeleton‐graphene membrane architecture within lightweight foams. This bioinspired design dramatically enhances multifunctional performance: vibration attenuation time decreases by ∼83.3%, damping capacity increases by ∼179.3%, and compressive modulus rises ...
Jigang Feng +6 more
wiley +1 more source
Review of Wideband Passive Reflectarray Antennas
IEEE AccessReflectarray antennas (RAs) combine the high gain and low-loss space feed of reflectors with the per-element phase control of phased arrays, but their resonant, path-length-dependent operation makes bandwidth their principal limitation.
Reza Shamsaee Malfajani, Ahmed A. Kishk
doaj +1 more source
Advanced Science, EarlyView.This study employs cryogenic magneto‐terahertz nanoscopy to reveal the real‐space electrodynamics of the colossal magnetoresistance transition. By capturing the terahertz electrodynamic evolution of field‐driven spin switching, the work unveils the dissipative dynamics of emergent metallic states, providing a high‐frequency view of coupled spin‐charge ...
Samuel Haeuser +6 more
wiley +1 more source
Engineering Slow‐Carrier Interfacial Recombination Enables Tailored Spectral Response
Advanced Science, EarlyView.This work demonstrates that weak‐drift slow carriers are preferentially captured at generic semiconductor surfaces/interfaces and recombine. This process is manipulated to achieve tailored spectral response. A tens of µm‐wide depletion region is created to observe surface collection rates for photocarriers generated at different positions.
Yibo Zhang +5 more
wiley +1 more source
Antenna arrays focused by broadband signals
Физика волновых процессов и радиотехнические системы, 2015 Broadband and ultra-wideband signals are increasingly used in modern antenna technology, and various radio systems. Traditional performance evaluation antennas operating with narrow band signals are not always adequately reflect the characteristics of ...
Yu.E. Sedelnikov, D.A. Vedenkin
doaj
Broadband double-layered coplanar patch antennas with adjustable CPW feeding structure [PDF]
, 2004 In this paper, we have presented the double-layered coplanar patch antennas of enhanced impedance bandwidth and adjustable conductor-backed coplanar waveguide feed lines.
Tong, K.F. +3 more
core
Physics‐Aware Machine‐Learning‐Driven Inverse Design of Broadband Ultra‐Open Acoustic Metamaterials
Advanced Science, EarlyView.A physics‐aware machine‐learning framework enables inverse design of ultra‐open acoustic silencers by decoupling spectral and radial design spaces. The approach rapidly identifies broadband, compact, and highly ventilated architectures, while revealing hidden linear design rules that link geometry, impedance matching, and acoustic performance.
Zhiwei Yang +5 more
wiley +1 more source