Results 231 to 240 of about 27,248 (265)

High frequency broadband absorption structures

1998 IEEE EMC Symposium. International Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.98CH36253), 2002
Since the introduction of the ferrite tile absorber, efforts have been made to increase the bandwidth of flat, single layer ferrites. In particular, it has been desirable to extend the bandwidth from the normal 30-1000 MHz range to greater than 2000 MHz.
F. Mayer, T. Ellam, Z. Cohn
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Ultra-broadband absorption by acoustic metamaterials

Applied Physics Letters, 2014
We design and experimentally realize an ultra-broad band metamaterial-based acoustic absorption material. Unlike traditional acoustic absorbers, the designed device features a simple configuration unrestricted by the material type and does not require extra sound-absorbing materials, suggesting the potential to have simultaneously structural-stiffness ...
Xue Jiang, Bin Liang, Rui-qi Li, Xin-ye Zou, Lei-lei Yin, Jian-chun Cheng   +5 more
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Electrically tunable graphene metamaterial with strong broadband absorption

Nanotechnology, 2020
Abstract The coupling system with dynamic manipulation characteristics is of great importance for the field of active plasmonics and tunable metamaterials. However, the traditional metal-based architectures suffer from a lack of electrical tunability.
Wei Yao, Linlong Tang, Jinpeng Nong, Jun Wang, Jun Yang, Yadong Jiang, Haofei Shi, Xingzhan Wei   +7 more
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Broadband Absorption in the Cavity Resonators with Changed Order

Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology, 2015
This paper presents an analysis of phenomena leading to high and broadband absorption at a structure combined of three elements: one-dimensional dielectric diffraction grating placed between silver grating and a thick silver substrate. Each element of the dielectric grating consists of media of different dielectric constants but of the same geometrical
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Passive–active broadband sound absorption

The Journal of the Acoustical Society of America, 1996
Researchers have proposed hybrid systems to achieve high sound absorption over a wide frequency range. The passive component of the system is comprised of a layer of sound absorbing material positioned at a distance from a movable wall, leaving an air space.
Jerome P. Smith, Ricardo A. Burdisso
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Plasmonics enhanced average broadband absorption of monolayer MoS2

2015 IEEE Photonics Conference (IPC), 2015
We have studied characterization of micromechanical cleavage monolayer molybdenum disulfide (MoS2) deposited on SiO2/Si and glass substrates. Spherical gold (Au) nanoparticles were anchored on top of monolayer MoS2 film. Direct reflection spectra were measured, which infers significant improvement of total average absorption of monolayer MoS2 in Vis ...
Bablu Mukherjee, Ergun Simsek
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Development of Photocatalytic Heterostructures With Broadband Absorption

Advanced Sustainable Systems
ABSTRACT Artificial photosynthesis systems that convert solar energy into storable energy have aroused great interest. However, it is generally challenging for a single‐component material to meet the requirements for a highly efficient photocatalyst, such as broadband light absorption and effective charge‐carrier separation ...
Zhaoyu Ma, Jiaming Fan, Yuxi Xie, Xiaoyan Cai, Liang Mao, Shiming Wu, Yeshuang Wang, Guo Chen, Junying Zhang   +8 more
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High absorption and a tunable broadband absorption based on the fractal Technology of Infrared Metamaterial Broadband Absorber

Diamond and Related Materials, 2022
Tong Xie, Dingbo Chen, Yanhong Xu, Yaorong Wang, Minwei Li, Zhenrong Zhang, Junbo Yang   +6 more
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Engineering the dispersion of metamaterial surface for broadband infrared absorption

Optics Letters, 2012
We propose a broadband infrared absorber by engineering the frequency dispersion of metamaterial surface (metasurface) to mimic an ideal absorbing sheet. With a thin layer of structured nichrome, a polarization-independent absorber with absorption larger than 97% is numerically demonstrated over a larger than one octave bandwidth.
Qin, Feng, Mingbo, Pu, Chenggang, Hu, Xiangang, Luo   +3 more
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Causal impedance matching for broadband hybrid noise absorption

The Journal of the Acoustical Society of America, 2003
The complementary strengths and weaknesses of passive and active noise control (ANC) methods have motivated many researchers to develop hybrid noise absorbers that integrate both control strategies. The impedance matching technique (IMT) is the most effective for such a purpose.
openaire   +3 more sources