Broadband acoustic cloak for ultrasound waves.
By Shu Zhang, Chunguang Xia, Nicholas X. Fang. Physical Review Letters, 2010
810 citations recorded by the source corpus.
Invisibility devices based on coordinate transformation have opened up a new field of considerable interest. We present here the first practical realization of a low-loss and broadband acoustic cloak for underwater ultrasound. This metamaterial cloak is constructed with a network of acoustic circuit elements, namely, serial inductors and shunt capacitors. Our experiment clearly shows that the acoustic cloak can effectively bend the ultrasound waves around the hidden object, with reduced scattering and shadow. Because of the nonresonant nature of the building elements, this low-loss (∼6 dB/m) cylindrical cloak exhibits invisibility over a broad frequency range from 52 to 64 kHz. Furthermore, our experimental study indicates that this design approach should be scalable to different acoustic frequencies and offers the possibility for a variety of devices based on coordinate transformation.
Subfields: Aerospace Engineering, Biomedical Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/044d48b89a659eb34fa2ee9c0d951a3766c71487
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Citations in the corpus
- Projection micro stereolithography based 3D printing and its applications (2020, background): “The applications of metamaterial evolve from electromagnetic materials [70–72], to elastic [73], acoustic [74, 75], as well as structural materials [30, 31].”
- Experimental realization of full control of reflected waves with subwavelength acoustic metasurfaces (2014, background): “The recent emergence of acoustic metamaterials [9-19] with properties unavailable in nature have broadened the horizon of acoustic waves and enabled fascinating phenomena such as sub-diffraction imaging [20-22], one-way transportation [23-27], cloaking [28-30], and super absorption [31, 32], etc.”