Acoustic demultiplexer based on Fano and induced transparency resonances in slender tubes

Mouadili, A.; Boudouti, El Houssaine El; Djafari‐Rouhani, Bahram

doi:10.1051/epjap/2020190324

Cited by 16 publications

(8 citation statements)

References 42 publications

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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%

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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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Section: Demultiplexer Based On Large Resonance Modessupporting

confidence: 52%

“…The demultiplexer consists of a Y-shaped waveguide with an input line and two channels. Each channel contains two stubs (resonators) grafted either at a given position or at two positions far from the input line [21].…”

Section: Introductionmentioning

confidence: 99%

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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“…It is worth noticing that a supplementary explanation of the AIT phenomenon can be given in terms of a bound in continuum state, or bound state in the continuum (BIC) [23,27]. Indeed, when the two resonators are exactly the same, the length L can be chosen in such a way as to find a bound state at the resonance frequency of Helmholtz resonators, associated with the system (resonator1 + tube of length L + resonator 2).…”

Section: Ait Based On the U-shape Structurementioning

confidence: 99%

“…Richoux et al demonstrated the splitter and combined function by waveguides loaded with Helmholtz resonators [21,22]. Mouadili et al theoretically proposed an acoustic demultiplexer with slender tubes based on Fano induced transparency resonances [23]. The aforementioned acoustic waveguides were originally investigated in two-port systems by introducing the phenomena of induced transparency or Autler-Townes splitting (ATS) [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Induced transparency based subwavelength acoustic demultiplexers

Gu¹,

Cheng²,

Wen³

et al. 2021

J. Phys. D: Appl. Phys.

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Wave demultiplexers transporting desired wavelengths towards proper directions or ports are attracting numerous interests and applications in both physical and engineering areas. In acoustics, there is still a lack of compact and simple designs to achieve demultiplexers in three-port systems. In this work, we propose such a design using Helmholtz resonators where the frequency selection is based on the phenomenon of acoustically induced transparency (AIT). First, a modified transfer matrix method is derived to analytically describe and analyze the AIT effect with Helmholtz resonators. Then, the good performances of wave routing in these designs are further demonstrated by both simulation and experiment. These AIT based demultiplexers are subwavelength and simple in their designs. Therefore, they are promising for various potential applications such as signal processing, information communication and sensing.

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“…Due to their strong interest, Fano and EIT phenomena are not restricted to atomic systems and have been the subject of intense studies in classical systems including photonic waveguides [20][21][22], acoustic slender tubes [23,24], plasmonic nanostructures [25,26] and metasurfaces [27]. Recently, Fano and EIT resonances have been also studied in Y-shaped demultiplexers in various areas such as photonic circuits [28], acoustic slender tubes waveguides [29,30] and plasmonic nanostructures [31][32][33]. Also, it is worth noticing that photonic demultiplexers based on 1D and 2D photonic structures have been the subject of intense studies in the last two decades due to their great interest in global communication systems [2,28,[34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Y-Shaped Demultiplexer Photonic Circuits Based on Detuned Stubs: Application to Radiofrequency Domain

Mouadili

Khattou²,

Amrani³

et al. 2021

Photonics

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We present a theoretical and experimental study of photonic demultiplexers based on detuned stubs. The demultiplexers consist of Y-shaped structures with one input line and two output lines. Two different types of structures are proposed to achieve a selective transfer of a single mode in one output line without disturbing the second one. (i) In the first platform each output contains two different stubs attached at two different sites (U-shaped resonators). We derive in closed form the geometrical parameters of the stubs to achieve a selected frequency in each line while keeping the other line unaffected. The frequency selection can be made on the basis of two different mechanisms, namely a Fano or an electromagnetic induced transparency (EIT) resonance. Consequently, different demultiplexing schemes can be designed by a combination of the two mechanisms, such as Fano-Fano, Fano-EIT or EIT-EIT. In particular, the width of the Fano or EIT resonances can become zero for an appropriate choice of the stubs’ lengths, giving rise to trapped modes also called bound in continuum states (BICs) with infinite quality factors. We also show that the crosstalk between the two outputs can reach minimum values around −45 dB. (ii) In the second platform, each output line contains a photonic comb with a defect stub. The latter is appropriately designed to filter one or a few frequencies in the bandgap of the photonic comb. The analytical calculations are performed with the help of the Green’s function method which enables us to derive the transmission and reflection coefficients as well as the density of states (DOS). These results are confirmed by experimental measurements using coaxial cables in the radio frequency domain.

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Acoustic demultiplexer based on Fano and induced transparency resonances in slender tubes

Cited by 16 publications

References 42 publications

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

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

Induced transparency based subwavelength acoustic demultiplexers

Y-Shaped Demultiplexer Photonic Circuits Based on Detuned Stubs: Application to Radiofrequency Domain

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