Photonic demultiplexer based on electromagnetically induced transparency resonances

Mouadili, A.; Boudouti, El Houssaine El; Soltani, A.; Talbi, Abdelkrim; Haddadi, Kamel; Akjouj, Abdellatif; Djafari‐Rouhani, Bahram

doi:10.1088/1361-6463/aaf11b

Cited by 19 publications

(13 citation statements)

References 76 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: 53%

“…8(a 775, the transmission rate of defect modes is maximal through the second output line (Transmission 2). To give a real illustration of our analytical and numerical results, and for the sake of comparison with previous experimental and theoretical works [30] concerning the electromagnetic demultiplexing process, we choose the following demultiplexer parameters: for Channel…”

Section: Color Map Of Transmission Rates In Each Output Linementioning

confidence: 99%

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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: 53%

Section: Color Map Of Transmission Rates In Each Output Linementioning

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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“…The structure proposed in this work may have important applications for electronic transport in mesoscopic systems like filters and demultiplexers. The possibility to realize a Y-shaped demultiplexer [80] with one input line and two output lines; where each containing its own appropriate wire-ring resonator is in progress. Indeed, such as device would allow filtering a given energy in one line keeping the other line unaffected.…”

Section: Discussionmentioning

confidence: 99%

Aharonov-Bohm-effect induced transparency and reflection in mesoscopic rings side coupled to a quantum wire

Mrabti

Labdouti

Mouadili

et al. 2020

Physica E: Low-dimensional Systems and Nanostructures

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We demonstrate analytically and numerically the possibility of existence of the analogues of electromagnetic induced transparency (EIT) and electromagnetic induced reflection (EIR) in a simple mesoscopic structure. The latter consists of a ring of length 2d attached vertically to two semi-infinite leads (waveguide) by a wire of length d 1 . The ring is threaded by a magnetic flux Φ, the so-called Aharonov-Bohm effect. The number of dangling wire-ring resonators attached at the same point can be increased to N. First, we demonstrate analytically that in the absence of the magnetic flux (Φ ¼ 0) and for particular values of d 1 , the structure may present some states that are confined in the ring and do not interact with the waveguide states. These trapped states fall in the continuum states of the two leads and therefore represent bound in continuum (BIC) states. These states are characterized by a zero width resonance (i.e., infinite life-time) in the transmission and reflection spectra. In presence of a weak magnetic flux (Φ 6 ¼ 0), the BIC states transform to EIT or EIR resonances for specific values of the lengths d 1 and d of the wire and the ring respectively. In addition to the numerical results, we have developed Taylor expansion calculations of the transmission and reflection coefficients around EIT and EIR resonances to show that the latter can be written following a Fano shape. In particular, we have deduced the Fano parameter q and the quality factor Q of these resonances as function of N and the flux Φ. We have found that Q decreases as function of Φ for both EIT and EIR resonances, whereas it increases (decreases) as function of N for EIT (EIR) resonances. These results show the possibility of tuning EIT and EIR resonances by means of the magnetic flux Φ and the number of dangling resonators N. The effect of temperature on EIT and EIR resonances is also considered through an analysis of the Landauer-Buttiker conductance formula obtained from transmission. The theoretical results are obtained within the framework of the Green's function method which enables us to deduce analytically the dispersion relation, transmission and reflection coefficients. These results may have important applications for electronic transport in mesoscopic systems such as filters and demultiplexers.

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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%

“…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]. Different mechanisms are used for designing demultiplexers based on photonic crystals such as defect waveguides [38], coupled cavities [39][40][41][42], superprisms [43], coupling and cascading photonic crystal waveguides [44], photonic crystal ring resonators [45,46], Mach-Zehnder interferometers [47], and spiral resonators [48].…”

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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Photonic demultiplexer based on electromagnetically induced transparency resonances

Cited by 19 publications

References 76 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

Aharonov-Bohm-effect induced transparency and reflection in mesoscopic rings side coupled to a quantum wire

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

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