Extraordinary Acoustic Transmission through a 1D Grating with Very Narrow Apertures

Lu, Ming‐Hui; Liu, Xiao-Kang; Feng, Lishuang; Li, Jian; Huang, Cheng-ping; Chen, Yanfeng; Zhu, Yanyan; Zhu, Shining; Ming, Nai‐Ben

doi:10.1103/physrevlett.99.174301

Cited by 265 publications

(174 citation statements)

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“…Although the nearly perfect imaging was confined to the near field of the acoustic metamaterial, it points to a possibility for constructing a 3D hyperlens for far-field subwavelength imaging by perforating a hemispherical solid with tapered holes in the radial direction. In addition to deep subwavelength imaging, other applications of acoustic metamaterials for extreme manipulation of acoustic waves include focusing, cloaking and extraordinary transmission or absorption [90][91][92][93] . Despite all the success achieved by acoustic metamaterials, other strategies such as time-reversal techniques 94,95 have also been extended to overcome acoustic imaging limitations.…”

Section: Extraordinary Imaging Properties Of the Hyperbolic Metalensmentioning

confidence: 99%

Hyperlenses and metalenses for far-field super-resolution imaging

2012

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The resolution of conventional optical lens systems is always hampered by the diffraction limit. Recent developments in artificial metamaterials provide new avenues to build hyperlenses and metalenses that are able to image beyond the diffraction limit. Hyperlenses project super-resolution information to the far field through a magnification mechanism, whereas metalenses not only super-resolve subwavelength details but also enable optical Fourier transforms. Recently, there have been numerous designs for hyperlenses and metalenses, bringing fresh theoretical and experimental advances, though future directions and challenges remain to be overcome.O ptical microscopy has revolutionized many fields such as microelectronics, biology and medicine. However, the resolution of a conventional optical lens system is always limited by diffraction to about half the wavelength of light. This diffraction barrier arises from the fact that subwavelength information from an object is carried by high spatial-frequency evanescent waves, which only exist in the near field. To overcome this diffraction limit, pioneering work has been carried out, including near-field scanning microscopy 1 , as well as fluorescence-based imaging methods 2,3 . These scanning-or random sampling-based nonprojection techniques achieve super-resolving power by sacrificing imaging speed, making them uncompetitive for dynamic imaging.Lens-based projection imaging remains the best option for high-speed microscopy. Immersion techniques have been proposed to enhance resolution, but they are limited by the low refractive indices of natural materials 4 . Emerging within the last decade, the fields of plasmonics and metamaterials provide solutions for engineering extraordinary material properties not found in nature, such as negative index of refraction 5,6 or strongly anisotropic materials 7,8 . This has provided tremendous opportunities for novel lens designs with unprecedented resolution 9 . Initiated by Pendry's seminal concept of the perfect lens 10 , a number of superlenses were demonstrated with resolving powers beyond the diffraction limit [11][12][13][14][15][16][17] . The optical superlens first achieved sub-diffraction-limited resolution by enhancing evanescent waves through a slab of silver 11 . As the evanescent-field enhancement is enabled by surface plasmon excitation, the subwavelength image is typically limited to the near field of the metal slab. However, the hyperlens-a metamaterial-based lens-can send super-resolution images into the far field by introducing a magnification mechanism. This has been considered as one of the most promising candidates for practical applications since its first demonstration in 2007 (refs 13,14). Recently, various other metamaterial-based lenses, that is, metalenses, have also been developed with both

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Section: Extraordinary Imaging Properties Of the Hyperbolic Metalensmentioning

confidence: 99%

Hyperlenses and metalenses for far-field super-resolution imaging

2012

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“…The experimental confirmation of complete transmission is reported by two groups [48,49], for a perforated brass plate immersed in water and for a slit array made of steel in air respectively. This full transmission has been called Extraordinary Acoustical Transmission [49] in the same way as EOT.…”

Section: State Of the Artmentioning

confidence: 69%

“…They found complete transmission through narrow holes using only the cutoff-free mode inside the hole. Very recently, several groups have also found similar full transmission peaks in PPPs [48,49,51].…”

Section: Rigid-solid Theorymentioning

confidence: 77%

“…The sound power transmission coefficient τ in (dB) has been calculated as a function of the normalized frequency fa/c 0 at normal incidence. The features described in several papers [46,48,49,47,51,55] assuming a perfectly rigid-solid (K → ∞) appear almost unchanged for K = 15. Resonant full transmission and the Wood anomaly can be observed for K = 15 and K → ∞ at fa/c 0 = 0.6, 0.99 and fa/c 0 = 1 respectively.…”

Section: The Role Of the Fluid-solid Impedance Mismatch K Hydrodynammentioning

confidence: 97%

“…This full transmission has been called Extraordinary Acoustical Transmission [49] in the same way as EOT.…”

Section: State Of the Artmentioning

confidence: 99%

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Ultrasonic transmission through periodically perforated plates

BELTRAN¹

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AgradecimientosLa presente tesis doctoral no hubiera sido posible sin la ayuda de mucha gente a la cual quiero mostrar mi agradecimiento en estas líneas.A Jaime Llinares por orientarme, darme la oportunidad de hacer el doctorado y presentarme a Francisco Meseguer.A Francisco Meseguer por depositar su confianza en mí para participar en este proyecto, por mostrarme el mundo fascinante de la física y guiarme en el campo de la investigación.A Antonio Uris por su dedicación como director de este trabajo y por transmitirme su constancia y empuje.A Francisco Belmar y Pilar Candelas por iniciarme en el mundo de los ultrasonidos y de los taladros, por su guía en los entresijos del doctorado y por las horas de fresadora y de medidas que compartimos.A Javier García de Abajo por su inestimable ayuda con los modelos teóricos, por su paciencia y por mostrarme el mundo de la física teórica y el arte de los modelos numéricos.A José M. Bravo por su entusiasmo y ayuda con los experimentos y los cálculos de FEM.Al CSIC por la beca JAE-predoctoral, gracias a la cual he podido desarrollar esta investigación a tiempo completo.Al grupo de metamateriales del Centro de Tecnologías Físicas por el excelente ambiente de trabajo. A Roberto Fenollosa por las conversaciones siempre interesantes sobre física y su ayuda en el laboratorio. A Isabelle Rodríguez por su gran ayuda con el lado químico de la fuerza. A Fernando Ramiro por esas entretenidas conversaciones y por su interés por las cosas del otro lado del Atlántico. A Michal Tymczenko por hacerme hablar en inglés. A Fernando y a Michal por su ayuda con los cacharros del taller y del iii laboratorio para los montajes experimentales, por su consejo y ayuda con Maquinón y por sus discusiones de Mac contra PC. A Moisés Garín por ser un férreo defensor y promotor del sofware libre, la limpieza y la seguridad en el trabajo. A Ana Moreno por su ayuda en el laboratorio y su compañía a la hora de comer y a Elisabet Xifré y a Elvira Bonet por alegrarme las mañanas. A Umut y a Lei por las amenas e interesantes conversaciones de camino a casa.A Fernando Cabrelles por su ayuda con el montaje experimental y la fresadora, por enseñarme que las cosas pueden ser más difíciles que lo que uno piensa y más fáciles que lo que uno imagina.Al grupo de Javier: Rebecca, Isabel, Alejandro, Xesús, Viktor y Johan por las amenas conversaciones sobre física y la inmejorable compañía en Madrid y en congresos.A Vicente y Ana por su acogida, su apoyo, su ejemplo y su consejo. A Vicent por hacerme sentir como en casa y a Ana por su excelente sentido del humor.A mis padres, Héctor e Idelvira, por su esfuerzo y su apoyo desde la distancia, por su entrega, su comprensión y su generosidad. A mis hermanas, Victoria y Verónica, por su alegría y complicidad.A mi esposa Ana, por su paciencia, su apoyo constante y su amor. AbstractBeing capable of mimicking some phenomena inherent in atomic scales, macroscopic periodic structures have been subject to intensive research in the last two decades. Perforated plates, although a very c...

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Multilateral Sound Manipulation Using Magnetically Tunable Apertures

Bansal,

Choi,

Subramanian

2024

Adv Eng Mater

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In recent years, planar aperture‐based acoustic devices have been investigated due to their thin form factor, high effective transmission, and sound modulation capability. Moreover, reconfigurable, and tunable devices are being continuously researched to enable multiple degrees of freedom in real‐time. Here, we present an aperture‐based acoustic device that enables tunable multilateral ultrasonic operation. Sound waves are manipulated in multiple directions by continuously tuning aperture width or length, using a magnetically controlled rod. We exploit the position, orientation, and geometrical properties of the rod (i.e., length, topographical curvature) to create a varied interface for the impinging sound. Through experiments and simulations, we demonstrate acoustic wave steering in different orthogonal planes and acoustic switching using a single tunable device unit. Furthermore, we implement different four‐unit device configurations for tunable beam‐formation and tunable acoustic focusing applications by utilizing the acoustic anisotropy of our system. Our tunable dynamic acoustic device is scalable to audible frequencies and enables tilted operation. This straightforward and accessible proof‐of‐concept opens a paradigm for exploring multifunctional aperture‐based designs with greater degrees of freedom, bringing us a step closer towards practical applications such as acoustic device integration with walls, window panels, and other commercial products for tunable sound transmission.This article is protected by copyright. All rights reserved.

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Extraordinary Acoustic Transmission through a 1D Grating with Very Narrow Apertures

Cited by 265 publications

References 24 publications

Hyperlenses and metalenses for far-field super-resolution imaging

Hyperlenses and metalenses for far-field super-resolution imaging

Ultrasonic transmission through periodically perforated plates

Multilateral Sound Manipulation Using Magnetically Tunable Apertures

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