Y-shaped branch structure using asymmetric resonators for phononic demultiplexing

Kadmiri, Ilyass El; Ben-Ali, Youssef; Khaled, Aissam; Bria, Driss

doi:10.1016/j.matpr.2020.03.521

Cited by 10 publications

(3 citation statements)

References 23 publications

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“…By adjusting the length of the resonator, specific transmission or reflection frequencies can be selectively filtered. Such behavior has been observed in [25].…”

Section: Transmission and Reflection Spectra In The Case Of A Wavegui...supporting

confidence: 65%

Electromagnetically Induced Transparency and Fano Resonances in Waveguides and U-shaped or Cross-shaped Resonators

Touiss,

El Kadmiri,

Errouas

et al. 2024

PIER M

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In this paper, we study one-dimensional (1D) integrated photonic systems composed of waveguides connected to resonators. We explain and discuss the appearance of two unique resonance phenomena: Fano transparency and electromagnetically induced transparency (EIT). These resonances play a crucial role in optimizing signal filtering in photonic devices. Our study focuses on two geometrical configurations: a cross-shaped arrangement with collocated lateral resonators at the same site and a U-shaped configuration with resonators positioned at different sites. We use Transfer Matrix Method (TMM) to analyze these configurations, improving existing theoretical models for photonic waveguide systems. Using this method, we can manipulate the geometrical parameters of resonators to fine-tune the transmission properties associated with the Fano and EIT resonances. Our results indicate that symmetrical resonators eliminate Fano resonance in cross-shaped structures, while the introduction of asymmetrical resonators induces their emergence. For U-shaped structures, we demonstrate the presence of Fano and EIT resonances, and show that their manifestation depends on the geometric parameters of the resonators. Our research has two major implications: Firstly, it advances the theoretical knowledge of resonance phenomena in photonic waveguides. Secondly, it provides a methodology for the design of photonic structures with adapted transmission characteristics, opening the way to applications in advanced signal processing technologies.

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“…By adjusting the length of the resonator, specific transmission or reflection frequencies can be selectively filtered. Such behavior has been observed in [25].…”

Section: Transmission and Reflection Spectra In The Case Of A Wavegui...supporting

confidence: 65%

Electromagnetically Induced Transparency and Fano Resonances in Waveguides and U-shaped or Cross-shaped Resonators

Touiss,

El Kadmiri,

Errouas

et al. 2024

PIER M

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“…These results show that the lengths of asymmetric resonators constituting the electromagnetic demultiplexer should be chosen appropriately in order to transfer a frequency in one transmission line by keeping the other transmission line unaffected. This type of resonance mode has already been found for a phononic and photonic demultiplexer with two channels, and each channel is composed of one segment and two asymmetric resonators [30][31][32]. These resonance modes are wide, i.e., low quality factor Q (calculated from Q = Ω/∆Ω where Ω is the central frequency of the mode, and ∆Ω is the width to half height of this mode) which can be considered poor in terms of signal guiding and filtering [24].…”

Section: Demultiplexer Based On Large Resonance Modessupporting

confidence: 52%

Two-Channel Demultiplexer Based on 1d Photonic Star Waveguides Using Defect Resonators Modes

Ben-Ali¹,

Kadmiri²,

Ghadban³

et al. 2021

PIER B

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In this work, we give a theoretical demonstration of the possibility to realize a photonic demultiplexer. The demultiplexer consists of Y-shaped waveguides with one input line and two output lines. We consider a demultiplexer composed of a segment and two asymmetric resonators, grafted at the same position in each channel. This system creates the resonance modes that have a maximum transmission rate and low Q quality factors. To improve these results, we take each output line consisting of a periodicity of segments and grafted at its extremities by a single resonator. Such a system creates passbands separated by band gaps. On the other hand, the presence of a resonator defect in the middle of each output line allows us to create defect modes inside the gaps. The results show that our proposed demultiplexer system manages to separate two incoming mixed signals of frequencies f 1 = 204.75 MHz and f 2 = 208.75 MHz and guide each one of them into two different channels.

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“…Each unit cell contains the waveguide segment and resonator or defect composing the CRAW. [4,17] These structures enable precise manipulation and control of acoustic waves, facilitating the creation of waveguides with desirable transmission properties and the formation of localized modes within bandgaps. The theoretical framework based on TB theory allows for constructing the Hamiltonian that describes the dynamics of acoustic waves propagating along these coupled resonant waveguides.…”

Section: Introductionmentioning

confidence: 99%

Coupled Resonator Acoustic Waveguides‐Based Acoustic Interferometers Designed within 2D Phononic Crystals: Experiment and Theory

Martínez‐Esquivel,

Méndez‐Sánchez,

Heo

et al. 2023

Advanced Physics Research

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The acoustic response of defect‐based acoustic interferometer‐like designs, known as Coupled Resonator Acoustic Waveguides (CRAWs), in 2D phononic crystals (PnCs) is reported. The PnC is composed of steel cylinders arranged in a square lattice within a water matrix with defects induced by selectively removing cylinders to create Mach‐Zehnder‐like (MZ) defect‐based interferometers. Two defect‐based acoustic interferometers of MZ‐type are fabricated, one with arms oriented horizontally and another one with arms oriented diagonally, and their transmission features are experimentally characterized using ultrasonic spectroscopy. The experimental data are compared with finite element method (FEM) simulations and with tight‐binding (TB) calculations in which each defect is treated as a resonator coupled to its neighboring ones. Significantly, the results exhibit excellent agreement indicating the reliability of the proposed approach. This comprehensive match is of paramount importance for accurately predicting and optimizing resonant modes supported by defect arrays, thus enabling the tailoring of phononic structures and defect‐based waveguides to meet specific requirements. This successful implementation of FEM and TB calculations in investigating CRAWs systems within PnCs paves the way for designing advanced acoustic devices with desired functionalities for various practical applications, demonstrating the application of solid‐state electronics principles to underwater acoustic devices description.

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Y-shaped branch structure using asymmetric resonators for phononic demultiplexing

Cited by 10 publications

References 23 publications

Electromagnetically Induced Transparency and Fano Resonances in Waveguides and U-shaped or Cross-shaped Resonators

Electromagnetically Induced Transparency and Fano Resonances in Waveguides and U-shaped or Cross-shaped Resonators

Two-Channel Demultiplexer Based on 1d Photonic Star Waveguides Using Defect Resonators Modes

Coupled Resonator Acoustic Waveguides‐Based Acoustic Interferometers Designed within 2D Phononic Crystals: Experiment and Theory

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