Nanoscale highly selective plasmonic quad wavelength demultiplexer based on a metal–insulator–metal

Azzazi, Abdulilah; Swillam, Mohamed A.

doi:10.1016/j.optcom.2015.01.014

Cited by 31 publications

(8 citation statements)

References 24 publications

(33 reference statements)

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“…The parameters of the dielectric constants of metals are challengeable to be adjusted and controlled in different wavelengths [13][14][15]. In comparison, graphene is a two-dimensional (2D) sheet which dielectric constant can be modulated dynamically by alternation of its applied bias voltage enabling unique features to be utilized in mid-infrared (MIR) region [16][17][18][19][20]. In practice, graphene has strong confinement of lightwaves, long propagation length, and low loss making it superior to metals [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

Asgari

Fabritius

2020

Applied Sciences

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In this study, a tunable graphene plasmonic filter and a two-channel demultiplexer are proposed, simulated, and analyzed in the mid-infrared (MIR) region. We discuss the optical transmission spectra of the proposed cross-shaped resonator and the two-channel demultiplexer. The transmission spectra of the proposed MIR resonator are tunable by change of its dimensional parameters and the Fermi energy of the graphene. Our proposed structures have a single mode in the wavelength range of 5-12 µm. The minimum full width at half maximum (FWHM) and the maximum transmission ratio of the proposed resonator respectively reached 220 nm and 55%. Simulations are performed by use of three-dimensional finite-difference time-domain (3D-FDTD) method. Coupled mode theory (CMT) is used to investigate the structure theoretically. The numerical and the theoretical results are in good agreement. The performance of the proposed two-channel demultiplexer is investigated based on its crosstalk. The minimum value of crosstalk reaches −48.30 dB. Our proposed structures are capable of providing sub-wavelength confinement of light waves, useful in applications in MIR region.

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Section: Introductionmentioning

confidence: 99%

Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

Asgari

Fabritius

2020

Applied Sciences

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“…The upper bound of power level, p 2max , should not exceed the input power level for stable bounded systems. An initial guess of the design parameters was made by building a structure similar to the optical filter proposed in [3] followed by studying the effect of varying the dimensions of each cavity resonator on the objective function, independently. The variation in the dimensions is done in small steps to maintain the best performance for the smallest practical structure.…”

Section: Design Methodologymentioning

confidence: 99%

“…Applying the optimization identity, and setting a maximum and minimum limits for the wavelength, high resolution is achieved down to 25 nm. The center offset 'D' affects both the line-width (FWHM) and the resonant wavelength value [3]. Two resonant peaks with wavelength shift of 15 nm were observed through the simulation of the double channel demultiplexer as shown in figure 12.…”

Section: Double Channel Demultiplexermentioning

confidence: 98%

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High performance optical systems using MIM based plasmonic structures

Ayoub

Swillam

2017

J. Phys. Commun.

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In this paper, the design of high performance optical systems based on MIM based plasmonic structures is proposed. Using a design methodology based on optimization functions, two novel components are proposed: demultiplexer and gas sensor. Further optimization of these plasmonic systems, high performance optical demultiplexer is maintained with a narrow line-width down to 4 nm with acceptable power level around 30%. On the other side, highly sensitive optical sensor is proposed with sensitivity up to 2000 nm and a limit of detection down to 10 −4 .

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“…The device is optimized for high selectivity and minimum FWHM (Full width at half maximum). The device is capable to achieve a demultiplexing FWHM of 9.8 nm for each channel with a high output transmission [18]. Khani et al have investigated a plasmonic demultiplexers using improved circular nanodisk resonators (CNRs), and metal-insulator-metal (MIM) waveguides have been designed.…”

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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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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Nanoscale highly selective plasmonic quad wavelength demultiplexer based on a metal–insulator–metal

Cited by 31 publications

References 24 publications

Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

High performance optical systems using MIM based plasmonic structures

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

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