Broadband non-reciprocal transmission of sound with invariant frequency

We design and experimentally demonstrate a broadband yet compact acoustic diode (AD) by using an acoustic nonlinear material and a pair of gain and lossy materials. Due to the capabilities of maintaining the original frequency and high forward transmission while blocking backscattered wave, our design is closer to the desired features of a perfect AD and is promising to play the essential diode-like role in realistic acoustic systems, such as ultrasound imaging, noise control and nondestructive testing. Furthermore, our design enables improving the sensitivity and the robustness of device simultaneously by tailoring an individual structural parameter. We envision our design will take a significant step towards the realization of applicable acoustic one-way devices, and inspire the research of non-reciprocal wave manipulation in other fields.

[1]  Yi Xuan,et al.  An All-Silicon Passive Optical Diode , 2012, Science.

[2]  Andrea Alù,et al.  An invisible acoustic sensor based on parity-time symmetry , 2015, Nature Communications.

[3]  A. G. Every,et al.  Reciprocity in reflection and transmission: What is a ‘phonon diode’? , 2013 .

[4]  Xu Ni,et al.  Tunable unidirectional sound propagation through a sonic-crystal-based acoustic diode. , 2011, Physical review letters.

[5]  B. Liang,et al.  An acoustic rectifier. , 2010, Nature materials.

[6]  Steven A. Cummer,et al.  Tunable active acoustic metamaterials , 2013 .

[7]  Daniel Torrent,et al.  Anisotropic mass density by two-dimensional acoustic metamaterials , 2008 .

[8]  Shiyue Hua,et al.  Parity–time symmetry and variable optical isolation in active–passive-coupled microresonators , 2014, Nature Photonics.

[9]  Steven A Cummer,et al.  Non-reciprocal and highly nonlinear active acoustic metamaterials , 2014, Nature Communications.

[10]  Yong Li,et al.  Unidirectional acoustic transmission based on source pattern reconstruction , 2012 .

[11]  R. Fleury,et al.  Sound Isolation and Giant Linear Nonreciprocity in a Compact Acoustic Circulator , 2014, Science.

[12]  A. Baz,et al.  Experimental characterization of active acoustic metamaterial cell with controllable dynamic density , 2012 .

[13]  Daniel Torrent,et al.  Omnidirectional broadband acoustic absorber based on metamaterials , 2012 .

[14]  Xiaobo Yin,et al.  Experimental demonstration of an acoustic magnifying hyperlens. , 2009, Nature materials.

[15]  C. K. Lee.  Theory of laminated piezoelectric plates for the design of distributed sensors/actuators. Part I: Governing equations and reciprocal relationships , 1990 .

[16]  Xue-Feng Zhu,et al.  P T -Symmetric Acoustics , 2014 .

[17]  J. Tao,et al.  Broadband directional acoustic waveguide with high efficiency , 2012 .

[18]  Xuefeng Zhu,et al.  PT-symmetric acoustics , 2015 .

[19]  Shanhui Fan,et al.  Parity–time-symmetric whispering-gallery microcavities , 2013, Nature Physics.

[20]  P. Sheng,et al.  Active control of membrane-type acoustic metamaterial by electric field , 2015 .

[21]  N. Fang,et al.  Focusing ultrasound with an acoustic metamaterial network. , 2009, Physical review letters.

[22]  Yong Li,et al.  Unidirectional acoustic transmission through a prism with near-zero refractive index , 2013 .

[23]  Xiaobo Yin,et al.  A holey-structured metamaterial for acoustic deep-subwavelength imaging , 2011 .

[24]  Bin Liang,et al.  Acoustic diode: rectification of acoustic energy flux in one-dimensional systems. , 2009, Physical review letters.

[25]  井上 良紀,et al.  流体力学用語集 非線形音響学(Nonlinear acoustics) , 1995 .

[26]  G. Theocharis,et al.  Bifurcation-based acoustic switching and rectification. , 2011, Nature materials.