Acoustic metamaterial antennas for combined highly directive-sensitive detection

Ma, Chengrong; Gao, Shuxiang; Cheng, Ying; Liu, Xiaojun

doi:10.1063/1.5107464

Cited by 27 publications

(18 citation statements)

References 33 publications

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“…As alternatives, piezoresistive, piezoelectric, capacitive, and optical-based sensors have been reported to achieve acoustic sensing, but usually, their detectable pressure is rather small [99,100]. Along with way toward high-performance acoustic sensing, AMMs offer unprecedented opportunities to advance acoustic sensing by their extraordinary properties like negative-equivalent or gradient density, bulk modulus, and refractive index through modulating the dispersion of materials and structures [10].…”

Section: Acoustic Sensingmentioning

confidence: 99%

Metamaterials-Enabled Sensing for Human-Machine Interfacing

2020

Sensors

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Our modern lives have been radically revolutionized by mechanical or electric machines that redefine and recreate the way we work, communicate, entertain, and travel. Whether being perceived or not, human-machine interfacing (HMI) technologies have been extensively employed in our daily lives, and only when the machines can sense the ambient through various signals, they can respond to human commands for finishing desired tasks. Metamaterials have offered a great platform to develop the sensing materials and devices from different disciplines with very high accuracy, thus enabling the great potential for HMI applications. For this regard, significant progresses have been achieved in the recent decade, but haven’t been reviewed systematically yet. In the Review, we introduce the working principle, state-of-the-art sensing metamaterials, and the corresponding enabled HMI applications. For practical HMI applications, four kinds of signals are usually used, i.e., light, heat, sound, and force, and therefore the progresses in these four aspects are discussed in particular. Finally, the future directions for the metamaterials-based HMI applications are outlined and discussed.

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Section: Acoustic Sensingmentioning

confidence: 99%

Metamaterials-Enabled Sensing for Human-Machine Interfacing

2020

Sensors

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“…Pioneering metamaterial‐based devices exhibit superior capability of acoustic wave control and wave sensing . Particularly, directional sound reception in a narrow angle range (rejecting noise from the other angles) is enabled by topological insulator with valley polarized edge states and phononic crystals . In addition, acoustic Mie scatterers demonstrated azimuthally varying pressure field dependent on the incident angle, enabling to identify the incident angle by using a conventional microphone imbedded in the scatterer .…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10][11] Despite their promising performance, the bioinspired directional sensors based on such an internal coupling or structurally coupled resonators pose challenges associated with dedicated sensing components and a limited sensing range (i.e., from 0° only up to 180°).Pioneering metamaterial-based devices exhibit superior capability of acoustic wave control [12][13][14][15][16][17][18] and wave sensing. [1,2,[19][20][21][22] Particularly, directional sound reception in a narrow angle range (rejecting noise from the other angles) is enabled by topological insulator with valley polarized edge states [19] and phononic crystals. [20,21] In addition, acoustic Mie scatterers demonstrated azimuthally varying pressure field dependent on the incident angle, enabling to identify the incident angle by using a conventional microphone imbedded in the scatterer.…”

mentioning

confidence: 99%

“…[1,2,[19][20][21][22] Particularly, directional sound reception in a narrow angle range (rejecting noise from the other angles) is enabled by topological insulator with valley polarized edge states [19] and phononic crystals. [20,21] In addition, acoustic Mie scatterers demonstrated azimuthally varying pressure field dependent on the incident angle, enabling to identify the incident angle by using a conventional microphone imbedded in the scatterer. [22] In such a sensor, pressure gains relative to the incident pressure, characterized by a single microphone, is related to the incident angle in a range of 0°-90°.…”

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confidence: 99%

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Fano‐Like Acoustic Resonance for Subwavelength Directional Sensing: 0–360 Degree Measurement

Lee

Nomura

et al. 2020

Advanced Science

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Directional sound sensing plays a critical role in many applications involving the localization of a sound source. However, the sensing range limit and fabrication difficulties of current acoustic sensing technologies pose challenges in realizing compact subwavelength direction sensors. Here, a subwavelength directional sensor is demonstrated, which can detect the angle of an incident wave in a full angle range (0°∼360°). The directional sensing is realized with acoustic coupling of Helmholtz resonators each supporting a monopolar resonance, which are monitored by conventional microphones. When these resonators scatter sound into free‐space acoustic modes, the scattered waves from each resonator interfere, resulting in a Fano‐like resonance where the spectral responses of the constituent resonators are drastically different from each other. This work provides a critical understanding of resonant coupling as well as a viable solution for directional sensing.

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“…Second, a highly directional and long-distance acoustic probing scheme is proposed by a combination of achromatic reflected metalens and triple sensors separated by a subwavelength interval, in which a signal processing method is adopted to eliminate interferences between incident waves and reflected waves, resulting in a highly directional receiving pattern. Note that the mechanism of our acoustic probing scheme is totally different from the highly directive-sensitive detection by an acoustic metamaterial with a near-zero-index [42].…”

Section: Introductionmentioning

confidence: 99%

Achromatic reflected metalens for highly directional and long-distance acoustic probing

Wang

et al. 2020

New J. Phys.

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Simultaneous temporal and spatial focusing of a pulse is of significance for detection and imaging.Here, an achromatic reflected metalens is designed using hybrid resonance and anti-resonance. The theoretical result demonstrates that the anti-resonance provides an extra degree of freedom to control local phases of reflected waves, yielding an achromatic lens of thickness equal to one half of central wavelength. To overcome the shortcoming of traditional approach to design lenses (neglecting the intercell coupling), a boundary integral method is proposed to alleviate the focus deviation over a broadband. The achromatic feature of designed lens is then verified in the frequency range from 2800 to 5600 Hz by an experiment. Owing to a very weak frequency dependence of focal point and a high reflected focusing efficiency over a broadband, a highly directional and long-distance acoustic probing scheme (the mainlobe width about 8 0 ) is proposed with the aid of achromatic reflected metalens and being confirmed by another experiment, where a signal processing method using triple sensors separated by a subwavelength interval is adopted to eliminate the interferences between incident waves and reflected waves. Our result may find its application in a long-distance underwater acoustic probing.

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Acoustic metamaterial antennas for combined highly directive-sensitive detection

Cited by 27 publications

References 33 publications

Metamaterials-Enabled Sensing for Human-Machine Interfacing

Metamaterials-Enabled Sensing for Human-Machine Interfacing

Fano‐Like Acoustic Resonance for Subwavelength Directional Sensing: 0–360 Degree Measurement

Achromatic reflected metalens for highly directional and long-distance acoustic probing

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