148 citations · 550 across the 10 of their papers we have counts for
6 papers · 1 filter
Nonreciprocal field transformation with active acoustic metasurfaces
X. Wen, C. Cho, X. Zhu +2
Field transformation, as an extension of the transformation optics, provides a unique means for nonreciprocal wave manipulation, while the experimental realization remains a signif…
Acoustic amplifying diode using non-reciprocal Willis coupling
Xinhua Wen, Heung Kit Yip, Choonlae Cho +2
We propose a concept called acoustic amplifying diode in combining both signal isolation and amplification in a single device. The signal is exponentially amplified in one directio…
Realizing spatiotemporal effective media for acoustic metamaterials
Xinhua Wen, Xinghong Zhu, Hong Wei Wu +1
The effective medium representation is fundamental in providing a performance-to-design approach for many devices based on metamaterials. While there are recent works in extending…
Asymmetric frequency conversion with acoustic non-Hermitian space-time varying metamaterial
Xinhua Wen, Xinghong Zhu, Alvin Fan +5
Space-time modulated metamaterials support extraordinary rich applications, such as parametric amplification, frequency conversion and non-reciprocal transmission. However, experim…
Acoustic Willis metamaterials beyond the passivity bound
Choonlae Cho, Xinhua Wen, Namkyoo Park +1
Acoustic bianisotropy, also known as the Willis parameter, expands the field of acoustics by providing nonconventional couplings between momentum and strain in constitutive relatio…
Digitally virtualized atoms for acoustic metamaterials
Choonlae Cho, Xinhua Wen, Namkyoo Park +1
By designing tailor-made resonance modes with structured atoms, metamaterials allow us to obtain constitutive parameters outside their limited range from natural or composite mater…