148 citations · 550 across the 10 of their papers we have counts for
10 papers
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…
Observation of acoustic Landau quantization and quantum-Hall-like edge states
Xinhua Wen, Chunyin Qiu, Yajuan Qi +4
Many intriguing phenomena occur for electrons under strong magnetic fields. Recently, it was proposed that an appropriate strain texture in graphene can induce a synthetic gauge fi…
Acoustic Dirac degeneracy and topological phase transitions realized by rotating scatterers
Xinhua Wen, Chunyin Qiu, Jiuyang Lu +3
The artificial crystals for classical waves provide a good platform to explore the topological physics proposed originally in condensed matter systems. In this paper, acoustic Dira…
Observation of Acoustic Valley Vortex States and Valley-Chirality Locked Beam Splitting
Liping Ye, Chunyin Qiu, Jiuyang Lu +5
The Letter reports an experimental observation of the classical version of valley polarized states in a two-dimensional hexagonal sonic crystal, where the inversion-symmetry breaki…
Highly efficient isolation of waterborne sound by an air-sealed metasurface
Xiaoxue Bai, Chunyin Qiu, Xinhua Wen +3
Underwater sound isolation has been a long-standing fundamental issue in industry and military fields. Starting from a simple theoretical model, here an air-sealed metasurface is p…