Results 151 to 160 of about 526,512 (257)
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Ultra‐high field (≥ 7 T) and 3 T MRI suffer from B1+ inhomogeneity and signal loss. Conventional metasurfaces that mitigate B1+ inhomogeneity and improve image SNR are “fixed” in nature and designed for a single Larmor frequency. This study demonstrates the feasibility of an adaptive metasurface utilizing voltage‐controlled capacitors ...
Paul S. Jacobs +7 more
wiley +1 more source
Combined Metasurface and Metamaterial Passive Transmit Lens and Receive Array for 3 T
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Metasurfaces (MSs) and metamaterials (MMs) can reduce transmit field nulls caused by wavelength effects at higher MR field strengths. We present a layered MM and MS resonant structure that improves transmit field performance when used as a combined slab (i.e., the metaslab), while also operating as a receive array.
Adam M. Maunder +4 more
wiley +1 more source
Fano resonances and collective effects in metamaterials
We review recent progress on the control of inter-meta-molecule interactions and collective effects in ...
Fedotov, V.A. +2 more
core +1 more source
Small, EarlyView.We have engineered a kirigami‐inspired deployable microneedle robot (KiriBot) capable of remotely controlled attachment to target tissues for sustained drug release. KiriBot incorporates a flexible structure that enhances conformability, improves adherence to irregular tissues, and facilitates microneedle insertion.
Kun Zhou +11 more
wiley +1 more source
Optimal Transmission Performance of Quadrature Wireless Resonators at 3 T
Magnetic Resonance in Medicine, Volume 97, Issue 1, Page 403-413, January 2027.ABSTRACT Purpose To demonstrate a method for optimizing the efficiency of wireless resonators using tailored excitation from a dual‐transmit birdcage coil (BC), and to present the design and experimental investigation of a quadrature resonator for 3 T breast MRI application.
Leila Sharipova +7 more
wiley +1 more source
Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.ABSTRACT Safe and reliable communication infrastructure for advanced air mobility requires an intelligent and adaptable propagation channel. Electromagnetic meta‐materials, especially meta‐surfaces such as the reconfigurable intelligent surface enable such intelligence allowing programmability with multiple modes of electromagnetic wave manipulation ...
Roshan Antony Gomez, Michael Kaliske
wiley +1 more source
Phase‐Controlled Momentum Bandgaps in Dual‐Channel Dispersive Photonic Time Crystals
Nanophotonics, Volume 15, Issue 22, 25 November 2026.A relative phase can determine whether a lossy photonic time crystal amplifies or attenuates light. By simultaneously modulating the squared plasma frequency and damping, we quantify how interference between two Floquet coupling pathways reshapes momentum bandgaps and controls complex eigenfrequencies.
Hongzhi Chen +5 more
wiley +1 more source
Unified Phase Criterion for Band Crossings in One‐Dimensional Topological Photonics
Nanophotonics, Volume 15, Issue 21, 12 November 2026.A unified phase criterion reveals the origin of band crossings in one‐dimensional photonic crystals. The accumulated propagation phases in constituent layers determine the emergence of degeneracies for both TE and TM polarizations. The Brewster condition is further identified as a special trajectory of TM band crossings, enabling disorder‐robust high ...
Jingxuan Song +4 more
wiley +1 more source
Functional nanomechanical metamaterials driven by light, electromagnetic forces and sound
, 2020 The changing balance of forces at the nanoscale allows a new generation of metamaterials in which electromagnetic forces, thermal stimulation, sound and optical signals can be engaged to dynamically change their optical ...
Plum, Eric +7 more
core
Electromagnetic Modeling of Metamaterials
IEICE Transactions on Communications, 2013 openaire +2 more sources