Results 81 to 90 of about 10,716 (266)

Liquid Crystal Tunable Metamaterial Absorber

Physical Review Letters, 2013
We present an experimental demonstration of electronically tunable metamaterial absorbers in the terahertz regime. By incorporation of active liquid crystal into strategic locations within the metamaterial unit cell, we are able to modify the absorption by 30% at 2.62 THz, as well as tune the resonant absorption over 4% in bandwidth.
David, Shrekenhamer, Wen-Chen, Chen, Willie J, Padilla   +2 more
openaire   +3 more sources

Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain

Advanced Materials, EarlyView.
A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha, Bilguun Nurzed, Mostafa Berangi, Andre Kuehne, Helmar Waiczies, Igor Fabian Tellez Ceja, Xiang Hu, Thomas Gladytz, Lisa Krenz, Dave Huebler, Beate Endemann, Claudia Brockmann, Ebba Beller, Oliver Stachs, Thoralf Niendorf   +14 more
wiley   +1 more source

Theoretical modeling and design of a graphene-based tunable metamaterial perfect absorber for broadband and narrowband terahertz applications

Next Materials
Metamaterial-based perfect absorbers operating in the terahertz range have been a topic of great interest to researchers because of their diverse applications.
Muhammad Hani Mazaheri, Husnul Maab, Arbab Abdur Rahim   +2 more
doaj   +1 more source

Theoretical design of a triple-band perfect metamaterial absorber in the THz frequency range

Results in Physics, 2019
A triple-band perfect metamaterial absorber based on periodically arranged graphene split ring resonator (SRR) is proposed in this study. The calculation results by the FDTD method indicate that the SRR structure has three absorption peaks at frequencies
Chunlian Cen, Zao Yi, Guangfu Zhang, Yubin Zhang, Cuiping Liang, Xifang Chen, Yongjian Tang, Xin Ye, Yougen Yi, Junqiao Wang, Jiangjin Hua   +10 more
doaj   +1 more source

A Colloidal Quantum Dot Thermistor and Bolometer

Advanced Materials, EarlyView.
This work introduces colloidal quantum dot thermistors employing a potential barrier structure to tune the activation energy of transport and hence the temperature coefficient of resistance (TCR). Upon integration with plasmonic absorbers, the CQD‐based bolometer device enables room‐temperature wavelength‐selective photodetection across the mid‐ to ...
Gaurav Kumar, Mariona Dalmases, Nima Taghipour, Rajesh Bera, Guy L. Whitworth, Goretti Torres Perez, Miguel Dosil, Gerasimos Konstantatos   +7 more
wiley   +1 more source

Ultra-wideband and Polarization-Insensitive Perfect Absorber Using Multilayer Metamaterials, Lumped Resistors, and Strong Coupling Effects

Nanoscale Research Letters, 2018
We theoretically and experimentally proposed a new structure of ultra-wideband and thin perfect metamaterial absorber loaded with lumped resistances.
Si-Jia Li, Peng-Xin Wu, He-Xiu Xu, Yu-Long Zhou, Xiang-Yu Cao, Jiang-Feng Han, Chen Zhang, Huan-Huan Yang, Zhao Zhang   +8 more
doaj   +1 more source

Multifunctional Bio‐Based Packaging for Perishable Foods: Structural Design, Scalable Fabrication, and Versatile Applications

Advanced Materials, EarlyView.
An overview of design principles and scalable fabrication strategies for multifunctional bio‐based packaging. Radiative cooling films, modified‐atmosphere films/membranes, active antimicrobial/antioxidant platforms, intelligent optical/electrochemical labels, and superhydrophobic surfaces are co‐engineered from material chemistry to mesoscale structure
Lei Zhang, Jiaqi Zhang, Mei Cui, Wei Qi, Renliang Huang, Rongxin Su, Kai Zhang   +6 more
wiley   +1 more source

Tilted Wire Metamaterials Enabling Ultra-Broadband Absorption from Middle to Very Long Infrared Regimes

Photonics
Infrared metamaterial absorbers underpin many entrenched scientific and technical applications, including radiative cooling, energy harvesting, infrared detectors, and microbolometers.
Pan Wang, Chengyu Xiao, Shaowen Chen, Mengqi Zhang, Ya Sun, Haoyu Wang, Jin Zhang, Han Zhou   +7 more
doaj   +1 more source

4D‐Printed Spin Crossover Metamaterials with Giant Programmable Positive or Negative Thermal Expansion

Advanced Materials, EarlyView.
Spin crossover composite filaments are implemented for the rational design of 4D‐printed mechanical metamaterials. The obtained bi‐material structures guided by a theoretical analysis based on analytical calculations and Finite Element Analysis simulations exhibit giant programmable positive or negative deformation with coefficients of thermal ...
Adelais Trapali, Yuteng Zhang, Seyed Ehsan Alavi, Nagham Mawassy, Raja Zulkarnain, Gábor Molnár, Lionel Salmon, Azzedine Bousseksou   +7 more
wiley   +1 more source

Large-area, wide-angle, spectrally selective plasmonic absorber

, 2011
A simple metamaterial-based wide-angle plasmonic absorber is introduced, fabricated, and experimentally characterized using angle-resolved infrared spectroscopy.
Andrew Milder, Burton Neuner, Byron Zollars, Chihhui Wu, Gennady Shvets, H. A. Haus, Jeremy John, Steve Savoy   +7 more
core   +1 more source