922 citations · 2.3k across the 8 of their papers we have counts for
9 papers
Active Willis metamaterials for ultra-compact non-reciprocal linear acoustic devices
Yuxin Zhai, Hyung-Suk Kwon, Bogdan-Ioan Popa
Willis materials are complex media characterized by four macroscopic material parameters, the conventional mass density, and bulk modulus and two additional Willis coupling terms,…
Acoustic Holographic Rendering with Two-dimensional Metamaterial-based Passive Phased Array
Yangbo Xie, Chen Shen, Wenqi Wang +5
Acoustic holographic rendering in complete analogy with optical holography are useful for various applications, ranging from multi-focal lensing, multiplexed sensing and synthesizi…
Active acoustic metamaterials reconfigurable in real-time
Bogdan-Ioan Popa, Durvesh Shinde, Adam Konneker +1
A major limitation of current acoustic metamaterials is that their acoustic properties are either locked into place once fabricated or only modestly tunable, tying them to the part…
Wavefront Modulation and Subwavelength Diffractive Acoustics with an Acoustic Metasurface
Yangbo Xie, Wenqi Wang, Huanyang Chen +3
Metasurfaces are a family of novel wavefront shaping devices with planar profile and subwavelength thickness. Acoustic metasurfaces with ultralow profile yet extraordinary wave man…
Measurements of Broadband Negative Index in Space-Coiling Acoustic Metamaterials
Yangbo Xie, Bogdan-Ioan Popa, Lucian Zigoneanu +1
We report the experimental demonstration of broadband negative refractive index obtained in a labyrinthine acoustic metamaterial structure. Two different approaches were employed t…
Phase Conjugation and Negative Refraction Using Nonlinear Active Metamaterials
Alexander R. Katko, Shi Gu, John P. Barrett +3
We present experimental demonstration of phase conjugation using nonlinear metamaterial elements. Active split-ring resonators loaded with varactor diodes are demonstrated theoreti…