Acoustically induced transparency using Fano resonant periodic arrays

Abstract

A three-dimensional acoustic device, which supports Fano resonance and induced transparency in its response to an incident sound wave, is designed and fabricated. These effects are generated from the destructive interference of closely coupled one broad- and one narrow-band acoustic modes. The proposed design ensures excitation and interference of two spectrally close modes by locating a small pipe inside a wider and longer one. Indeed, numerical simulations and experiments demonstrate that this simple-to-fabricate structure can be used to generate Fano resonance as well as acoustically induced transparency with promising applications in sensing, cloaking, and imaging.

Quasiperfect absorption by subwavelength acoustic panels in transmission using accumulation of resonances due to slow sound

“…By tuning a second HR the reflection problem can be critically coupled and, therefore, perfect absorption is obtained. The propagation of acoustic waves in waveguides loaded by arrays of monopolar resonators have been also considered previously, e.g., as in arrays of QWRs [23], arrays of HRs [24] producing Bragg interference and local resonances, and arrays of two concentrically placed QWRs producing Fano resonance [25]. In this work, we present quasiperfect absorption in a subwavelength metamaterial panel for transmission problems using identical monopolar resonators.…”

A perfect Fresnel acoustic reflector implemented by a Fano-resonant metascreen

“…31 The Electromagnetically induced transparency (EIT) [32][33][34] and the associated Fano resonances 35,36 are wellestablished areas of optics research, recently investigated in the context of acoustics. [37][38][39] The optical parabolic reflectors have historically been used in telescopes to focus the light rays coming from distant objects. In electromagnetics, parabolic reflectors have been widely implemented as high gain aperture antennas.…”

Observation of Acoustically Induced Transparency for γ -Ray Photons

“…The proposed technique allows extending the concept of induced optical transparency to a hard x-ray/-ray range and paves the way for acoustically controllable interface between x-ray/-ray photons and nuclear ensembles, advancing the field of x-ray/-ray quantum optics.The induced transparency of opaque medium for resonant electromagnetic radiation is a powerful tool for manipulating the field-matter interaction. The study of phenomena associated with transparency induced in natural and artificial quantum and classical systems for resonant electromagnetic radiation in a wide spectral range from microwaves to γ-rays, as well as their applications, is an extremely broad area of research [1][2][3][4][5][6][7][8][9][10][11][12], extended also to acoustic waves [13,14]. Self-induced transparency [1], transparency via Autler-Townes splitting (ATS) [2,3], and electromagnetically induced transparency (EIT) [4,5] including their analogs in various quantum and classical systems [6][7][8][9][10][11], are just several examples of numerous techniques for suppression of resonant absorption.…”