Phononic Crystal Made of Multilayered Ridges on a Substrate for Rayleigh Waves Manipulation

Oudich, Mourad; Djafari‐Rouhani, Bahram; Bonello, Bernard; Pennec, Yan; Sarry, F.

doi:10.3390/cryst7120372

Cited by 22 publications

(17 citation statements)

References 65 publications

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“…The concept opens promising perspectives to observe quantum optomechanic phenomena and also for the design of optomechanic based devices which could integrate microchips, for biosensing for instance with high sensitivity down to single molecule detection. Besides the cavity modes, another type of localized modes in the multilayer pillars may be those associated with their upper surface, as we investigated them in a very recent work (using ridges instead of pillars [63]). In the system studied in this paper, such modes can appear in the BG of the multilayer when changing the thickness or composition of the upper layer in the pillar.…”

Section: Resultsmentioning

confidence: 99%

Rayleigh Waves in Phononic Crystal Made of Multilayered Pillars: Confined Modes, Fano Resonances, and Acoustically Induced Transparency

et al. 2018

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We present a design of phononic crystal based on pillars distributed on a substrate surface in which each pillar is constructed by a periodic stacking of PMMA and silicon layers. The pillar behaves like a one-dimensional phononic crystal which allows the creation of band gaps that prohibits wave propagation along the pillar. Thanks to this property, we show that confined modes are produced at the pillar-substrate interface which couples with surface acoustic waves (SAW) and causes their attenuation. Furthermore, by tailoring a defect inside the phononic pillar, we reveal the possibility to create confined cavity modes inside the band gap which can strongly couple with SAW. The cavity modes can be excited by SAW and the coupling produces sharp SAW transmissions. Additionally, we demonstrate that the coupling between the cavity modes and the confined modes at the pillar-substrate interface can give rise to a Fano-like resonance. We also evidence the possibility of generating an acoustic analogue of electromagnetically induced transparency for SAW with high transmission in a narrow bandwidth. The system presents perspectives for the design of high quality-factor phononic excitation for optomechanic devices and phonon circuits based on SAW manipulation.

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Section: Resultsmentioning

confidence: 99%

Rayleigh Waves in Phononic Crystal Made of Multilayered Pillars: Confined Modes, Fano Resonances, and Acoustically Induced Transparency

et al. 2018

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“…Breaking the periodicity of PCs and generating resonant modes inside the photonic band gaps increase the novelty of such periodic structures more than the perfect ones. Based on these remarkable physical and engineering applications, PCs inspired researchers to replicate this idea on different types of waves e.g., elastic, acoustic, surface, electric and magnetic waves 8–13 . Recently, the process of solutions and liquids sensing by using PCs has attracted great attention due to its major role in many biological, biochemical and engineering applications 14–21 .…”

Section: Introductionmentioning

confidence: 99%

Ultra-high sensitive 1D porous silicon photonic crystal sensor based on the coupling of Tamm/Fano resonances in the mid-infrared region

Ahmed

Mehaney

2019

Sci Rep

161

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Porous silicon one-dimensional photonic crystals (PSi-1DPCs) are capable of sensing solutions and liquids based on the smallest variation of the refractive indices. In the present work, we present a novel metal/PSi-1DPC as a liquid sensor based on Tamm/Fano resonances. The operating wavelength range is from 6.35 to 9.85 μm in the mid-infrared (MIR) spectral region. Different metals (Al, Ag, Au, and Pt) are attached to the top surface of the PSi-1DPCs structure to show Tamm/Fano resonances more clearly. To the best of our knowledge, it is the first time that Tamm/Fano resonances exhibit simultaneously in PSi-1DPCs within the same structure. The reflection spectra were calculated for the metal/PSi-1DPC structure by using the transfer matrix method (TMM) and the Bruggeman’s effective medium approximation (BEMA). The simulations show that the Tamm/Fano resonances are red-shifted towards the higher wavelengths with increasing the refractive index of the pores. The Ag/PSi-1DPC sensor showed the highest performance. Its sensitivity can be reached to the value 5018 nm/RIU with a high-quality factor of about 2149.27. We predict the proposed sensors can be easily fabricated and we expect them to show higher performance than other reported sensors of this type. Therefore, it will be of interest in the field of optical sensing in different fields.

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“…Love mode [93,94]. More generally, owing to the recent growing interest in the topic of metasurfaces, where a very thin (sub-wavelength) structure containing phase array elements can manipulate the propagation of sound (or light) and give rise to various new effects such as anomalous refraction and reflection and focusing or imaging phenomena, a line of resonant pillars on a plate or a substrate provides a new tool for exhibiting similar features by manipulating the propagation of plate and surface waves.…”

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confidence: 99%

Physics of surface vibrational resonances: pillared phononic crystals, metamaterials, and metasurfaces

et al. 2021

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The introduction of engineered resonance phenomena on surfaces has opened a new frontier in surface science and technology. Pillared phononic crystals, metamaterials, and metasurfaces are an emerging class of artificial structured materials, featuring surfaces, that consist of pillars-or branching substructures-standing on a substrate or a plate. A pillared phononic crystal exhibits Bragg band gaps while a pillared metamaterial may feature both Bragg gaps and local-resonance hybridization gaps. These two band-gap phenomena, along with other unique wave dispersion characteristics, have been exploited for a variety of applications spanning a range of length scales and covering multipe disciplines in applied physics and engineering. The placement of pillars on a semi-infinite surface has similarly provided new avenues for the control and manipulation of wave propagation, including Rayleigh and Love waves along the surface of substrates, as well as Lamb waves in plates-for frequencies ranging from Hz to several GHz. Even a finite placement of pillars along specific directions on a surface has been shown to offer unique functionality, such as steering a wavefront in the subwavelength regime. At the nanoscale, pillared membranes have been investigated and it was shown that atomic-scale resonances-stemming from the nanopillars-alter the fundamental nature of conductive thermal transport by reducing the group velocities and generating mode localization across the entire spectrum well into the THz regime. In this article, we first overview the history and development of pillared materials, then provide a detailed synopsis of a selection of key research topics that involve the utilization of pillars in different contexts. The following sections present a review of different configurations, properties, and 2 characteristics, namely: (i) fundamental vibrational and propagation properties of pillared plates; (ii) metamaterial phenomena in pillared plates including the opening of low and wide hybridization band gaps as well as super-resolution focusing; (iii) pillared metasurfaces and their wave steering functions;(iv) topologically protected phononic edge states in pillared plates; and (v) nanophononic metamaterials in the form of pillared membranes exhibiting exceptionally low in-plane thermal conductivity. Finally, we conclude by providing a short summary on the salient properties of pillared materials and structures and outlining some perspectives on the state of the field and its promise for further future development.

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Phononic Crystal Made of Multilayered Ridges on a Substrate for Rayleigh Waves Manipulation

Cited by 22 publications

References 65 publications

Rayleigh Waves in Phononic Crystal Made of Multilayered Pillars: Confined Modes, Fano Resonances, and Acoustically Induced Transparency

Rayleigh Waves in Phononic Crystal Made of Multilayered Pillars: Confined Modes, Fano Resonances, and Acoustically Induced Transparency

Ultra-high sensitive 1D porous silicon photonic crystal sensor based on the coupling of Tamm/Fano resonances in the mid-infrared region

Physics of surface vibrational resonances: pillared phononic crystals, metamaterials, and metasurfaces

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