A proposal for a demultiplexer based on plasmonic metal–insulator–metal waveguide-coupled ring resonator operating in near-infrared spectrum

Nurmohammadi, Tofiq; Abbasian, K.; Yadipour, Reza

doi:10.1016/j.ijleo.2017.05.109

Cited by 23 publications

(15 citation statements)

References 31 publications

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“…Results show that the sensitivit of all curves in mode 1 are higher than those in mode 2, while most of those FOM in mod 2 are higher than in mode 1. The calculated maximum sensitivity can reach 2600 nm/RIU and simultaneously achieve S = 2000.00 nm/RIU in mode 1 and 1200.00 nm/RIU in mod [7,11,17,21,27,39] nm, respectively. The other structural parameters are on the top of the figures.…”

Section: Investigation Of Sensor Structure With Transmittance Peaks In Type 3 Structurementioning

confidence: 90%

“…Hence, we adopted th stub height of h = 200 nm and metal defects' N = 21 as the standard value for further stud ies. [100,200,300,350,400,450] nm and (b) for varying the number of Ag nanorod's radius (N) in the range of [7,11,17,21,27,39] nm, respectively. The other structural parameters are on the top of the figures.…”

Section: Investigation Of Sensor Structure With Transmittance Peaks In Type 3 Structurementioning

confidence: 99%

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Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures

et al. 2021

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This work proposed a multiple mode Fano resonance-based refractive index sensor with high sensitivity that is a rarely investigated structure. The designed device consists of a metal–insulator–metal (MIM) waveguide with two rectangular stubs side-coupled with an elliptical resonator embedded with an air path in the resonator and several metal defects set in the bus waveguide. We systematically studied three types of sensor structures employing the finite element method. Results show that the surface plasmon mode’s splitting is affected by the geometry of the sensor. We found that the transmittance dips and peaks can dramatically change by adding the dual air stubs, and the light–matter interaction can effectively enhance by embedding an air path in the resonator and the metal defects in the bus waveguide. The double air stubs and an air path contribute to the cavity plasmon resonance, and the metal defects facilitate the gap plasmon resonance in the proposed plasmonic sensor, resulting in remarkable characteristics compared with those of plasmonic sensors. The high sensitivity of 2600 nm/RIU and 1200 nm/RIU can simultaneously achieve in mode 1 and mode 2 of the proposed type 3 structure, which considerably raises the sensitivity by 216.67% for mode 1 and 133.33% for mode 2 compared to its regular counterpart, i.e., type 2 structure. The designed sensing structure can detect the material’s refractive index in a wide range of gas, liquids, and biomaterials (e.g., hemoglobin concentration).

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Section: Investigation Of Sensor Structure With Transmittance Peaks In Type 3 Structurementioning

confidence: 90%

Section: Investigation Of Sensor Structure With Transmittance Peaks In Type 3 Structurementioning

confidence: 99%

Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures

et al. 2021

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“…As a result, they are suitable candidates for the realization of highly integrated optical circuits. Various structures have been proposed based on SPPs such as plasmonic filters 7 , 8 , sensors 9 – 12 , directional couplers 13 , 14 , splitters 15 , demultiplexers (DEMUXes) 16 , 17 , logic gates 18 – 20 , modulators 21 , 22 , switches 23 – 26 and so on. One of the most important devices in optical communication is DEMUX structures.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable and scalable 2,4-and 6-channel plasmonics demultiplexer utilizing symmetrical rectangular resonators containing silver nano-rod defects with FDTD method

Khani

Farmani

Mir

2021

Sci Rep

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Reconfigurable and scalable plasmonics demultiplexers have attracted increasing attention due to its potential applications in the nanophotonics. Therefore, here, a novel method to design compact plasmonic wavelength demultiplexers (DEMUXes) is proposed. The designed structures (two, four, and six-channel DEMUXes) consist of symmetrical rectangular resonators (RRs) incorporating metal nano-rod defects (NRDs). In the designed structures, the RRs are laterally coupled to metal–insulator-metal (MIM) waveguides. The wavelengths of the output channels depend on the numbers and radii of the metal NRDs in the RRs. The results obtained from various device geometries, with either a single or multiple output ports, are performed utilizing a single structure, showing real reconfigurability. The finite-difference time-domain (FDTD) method is used for the numerical investigation of the proposed structures. The metal and insulator used for the realization of the proposed DEMUXes are silver and air, respectively. The silver’s permittivity is characterized by the well-known Drude model. The basic plasmonic filter which is used to design plasmonic DEMUXes is a single-mode filter. A single-mode filter is easier to cope with in circuits with higher complexity such as DEMUXes. Also, different structural parameters of the basic filter are swept and their effects on the filter’s frequency response are presented, to provide a better physical insight. Taking into account the compact sizes of the proposed DEMUXes (considering the six-channel DEMUX), they can be used in integrated optical circuits for optical communication purposes.

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“…A MIM structure is composed of two metallic claddings and a dielectric core which commonly are chosen to be silver and air, respectively. Today, MIM waveguides have been widely applied in numerous compact all-optical devices such as filters [8][9][10][11], directional couplers [12], switches [13], plasmonic sensors [14,15], power splitters and demultiplexers [16][17][18][19][20]. Power splitters, with equal power ratio, play an indispensable part in designing multi-way PICs.…”

Section: Introductionmentioning

confidence: 99%

Proposal for metal–insulator–metal plasmonic power splitter and demultiplexer suitable for implementation in optical switches

Ghasemi

Bayati

2021

IET Optoelectronics

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The authors propose a nanoplasmonic structure based on metal-insulator-metal (MIM) waveguides which consists of a 3 db power splitter and a side-coupled nanocavity placed between its two output ports. The proposed structure is analysed by the resonant theory and dispersion relation. Transmission spectra of the presented device are also extracted using the finite difference time domain method. Numerical simulations demonstrate that the structure operates as a band-stop filter in each output channel. Moreover, the resonance wavelengths can be tuned by adjusting the geometrical parameters of the nanocavity. Meanwhile, the authors developed the cavity and added an extra stub to it to append a new stopband to the output spectrum. Each resonance wavelength can be easily manipulated by changing the widths of the nanocavity and the added stub. In the end, by choosing two different lengths for the side-coupled cavities, the authors convert the power splitter into a wavelength division multiplexer. These introduced MIM, the authors proposed here, may have various meaningful applications in nanoscale high-density photonic circuits such as optical switches, logic plasmonic circuits and slow-light devices. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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A proposal for a demultiplexer based on plasmonic metal–insulator–metal waveguide-coupled ring resonator operating in near-infrared spectrum

Cited by 23 publications

References 31 publications

Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures

Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures

Reconfigurable and scalable 2,4-and 6-channel plasmonics demultiplexer utilizing symmetrical rectangular resonators containing silver nano-rod defects with FDTD method

Proposal for metal–insulator–metal plasmonic power splitter and demultiplexer suitable for implementation in optical switches

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