Results 71 to 80 of about 13,339 (215)

Modulating Sound with Acoustic Metafiber Bundles

Scientific Reports, 2017
Acoustic metamaterials and metasurfaces provide great flexibility for manipulating sound waves and promise unprecedented functionality, ranging from transformation acoustics, acoustic cloaking, acoustic imaging to acoustic rerouting.
Jian-ping Xia, Hong-xiang Sun, Shou-qi Yuan   +2 more
doaj   +1 more source

Asymptotic network models of subwavelength metamaterials formed by closely packed photonic and phononic crystals

, 2017
We demonstrate that photonic and phononic crystals consisting of closely spaced inclusions constitute a versatile class of subwavelength metamaterials. Intuitively, the voids and narrow gaps that characterise the crystal form an interconnected network of
Craster, Richard V., Schnitzer, Ory, Vanel, Alice L.   +2 more
core   +1 more source

Design and Fabrication of High Dielectric GRIN Lens for a Directive Antenna Using a Hybrid Filled Voxel Additive Manufacturing Technique

Advanced Materials Technologies, EarlyView.
Hybrid‐filled voxel AM enables integration of high‐permittivity materials into additively manufactured devices. Using this approach, a graded refractive index (GRIN) lens is demonstrated, achieving a 50% antenna size reduction with enhanced directivity.
Qianfang Zheng, Anna Radkovskaya, Kailun Xu, Ekaterina Shamonina, Patrick S. Grant   +4 more
wiley   +1 more source

Seismic Waveguide of Metamaterials

, 2012
We have developed a new method of an earthquake-resistant design to support conventional aseismic designs using acoustic metamaterials. We suggest a simple and practical method to reduce the amplitude of a seismic wave exponentially.
Beranek L. L., Caloz C., MUKUNDA P. DAS, SANG-HOON KIM, Villaverde R.   +4 more
core   +1 more source

Double-negative acoustic metamaterials [PDF]

Quarterly of Applied Mathematics, 2019
The aim of this paper is to provide a mathematical theory for understanding the mechanism behind the double-negative refractive index phenomenon in bubbly fluids. The design of double-negative metamaterials generally requires the use of two different kinds of subwavelength resonators, which may limits the applicability of double-negative metamaterials.
Ammari, Habib, Fitzpatrick, Brian, Lee, Hyundae, Yu, Sanghyeon, Zhang, Hai   +4 more
openaire   +3 more sources

Wireless Power Transfer Modalities for Implantable Bioelectronics: Electromagnetic, Acoustic, and Magneto‐Dynamic Perspectives

Advanced Materials Technologies, EarlyView.
This review traces the evolution of wireless power transfer (WPT) for implantable medical devices, spanning electromagnetic, magnetoelectric, acoustic, and magneto‐dynamic systems. Quantitative comparisons of power, distance, and device scale highlight trade‐offs across modalities, while emerging hybrid mechanisms reveal strategies to overcome ...
Junyeop Kim, Yoonseok Park
wiley   +1 more source

Low-frequency attenuation signal absorption performance of thin-film acoustic metamaterials

Acta Acustica
Considering that thin film acoustic metamaterials have many special properties that natural materials and traditional materials do not possess, the low-frequency attenuation signal absorption performance of thin film acoustic metamaterials is studied ...
Xu Jingcheng, Chen Changzheng
doaj   +1 more source

Thin-Film Metamaterials called Sculptured Thin Films

, 2010
Morphology and performance are conjointed attributes of metamaterials, of which sculptured thin films (STFs) are examples. STFs are assemblies of nanowires that can be fabricated from many different materials, typically via physical vapor deposition onto
A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Lakhtakia, A. Shalabaney, A.C. Popta van, A.L. Elias, B. Dick, D.-X. Ye, D.-X. Ye, E. Ertekin, E. Schubert, F. Wang, F. Wang, F. Wang, F. Zhang, F. Zhang, G.K. Kiema, H. Tan, I. Hodgkinson, I.J. Hodgkinson, I.J. Hodgkinson, I.J. Hodgkinson, J.A. Polo, J.A. Polo Jr, J.A. Polo Jr, J.A. Reyes, J.A. Sherwin, J.A. Sherwin, J.A. Sherwin, J.B. Geddes III, J.C. Sit, J.J. Steele, J.J. Steele, J.M. Nieuwenhuizen, J.N. Broughton, K. Robbie, K. Robbie, K. Robbie, K.D. Harris, M. Malac, M. Suzuki, M.A. Motyka, M.A. Motyka, M.C. Demirel, M.C. Demirel, M.O. Jensen, M.W. Horn, M.W. Horn, M.W. Seto, N. Verplanck, N.O. Young, P.C.P. Hrudey, R. Messier, R. Messier, R. Messier, R. Walser, R.J. Carey, R.J. Martín-Palma, R.J. Martín-Palma, R.J. Martín-Palma, S. Pursel, S. Tsoi, S.M. Pursel, T. Motohiro, T.G. Mackay, V.C. Venugopal, V.C. Venugopal, Y. Inoue, Y. Zhou, Y.J. Park   +83 more
core   +1 more source

Multi‐Material Additive Manufacturing of Soft Robotic Systems: A Comprehensive Review

Advanced Robotics Research, EarlyView.
This review explores the transformative role of multi‐material additive manufacturing (MMAM) in the development of soft robotic systems. It presents current techniques, materials, and design strategies that enable functionally graded and adaptive structures.
Ritik Raj, Quan‐Chen Song, Jia‐Yang Juang   +2 more
wiley   +1 more source

Theoretical Optimization of Trapped-Bubble-Based Acoustic Metamaterial Performance

Applied Sciences, 2020
Acoustic metamaterials have proven to be a versatile tool for the precise control and manipulation of sound waves. One of the promising designs of acoustic metamaterials employ the arrays of bubbles and find applications for soundproofing, blast ...
Dmitry Gritsenko, Roberto Paoli
doaj   +1 more source