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

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shiva Khani ◽  
Ali Farmani ◽  
Ali Mir
Keyword(s):  
Structural Parameters ◽  
Fdtd Method ◽  
Single Mode ◽  
Metal Insulator Metal ◽  
Integrated Optical ◽  
Potential Applications ◽  
Single Structure ◽  
Physical Insight ◽  
Novel Method ◽  
Optical Circuits

AbstractReconfigurable 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.

WAVELENGTH DEMULTIPLEXING IN METAL–INSULATOR–METAL PLASMONIC WAVEGUIDES

2014 ◽  
Vol 28 (04) ◽  
pp. 1450025 ◽  
Author(s):  
XIANKUN YAO
Keyword(s):  
Transmission Efficiency ◽  
Plasmonic Waveguides ◽  
Metal Insulator ◽  
Metal Insulator Metal ◽  
Integrated Optical ◽  
Potential Applications ◽  
Wavelength Demultiplexing ◽  
Optical Circuits ◽  
Difference Time ◽  
Mim Waveguide

In this paper, we have numerically investigated a novel kind of ultra-compact wavelength demultiplexing (WDM) in high-confined metal–insulator–metal (MIM) plasmonic waveguides. It is found that the drop transmission efficiency of the filtering cavity can be strongly enhanced by introducing a side-coupled cavity in the MIM waveguide. The theoretical analysis is verified by the finite-difference time-domain simulations. Through cascading the filtering units, a highly effective triple-wavelength demultiplexer is proposed by selecting the specific separation between the two coupled cavities of filtering units. Our results may find potential applications for the nanoscale WDM systems in highly integrated optical circuits and networks.

Optical bistability effect in SPP-based metallic grating containing Kerr nonlinear medium

2017 ◽  
Vol 31 (24) ◽  
pp. 1750146 ◽  
Author(s):  
Dan Liu ◽  
Lingxi Wu ◽  
Qiong Liu ◽  
Sa Yang ◽  
Renlong Zhou ◽  
...  
Keyword(s):  
Nonlinear Medium ◽  
Optical Bistability ◽  
Fdtd Method ◽  
Metallic Grating ◽  
Plasmonic Structure ◽  
Resonance Modes ◽  
Resonant Modes ◽  
Metal Insulator Metal ◽  
Integrated Optical ◽  
Optical Circuits

We theoretically investigate the characteristics of the resonant modes and the optical bistability (OB) effect in the proposed metal–insulator–metal plasmonic structure containing Kerr nonlinear medium. By using finite difference time domain (FDTD) method, it is found that the plasmon resonance modes can be modulated with the change of the height of metallic grating, the thickness of Kerr material layer and refractive index. We also study the characteristic of OB with the correspondingly detuning parameters. The designed plasmonic structure can be potentially applied to projecting SPP-based nonlinear optical devices in integrated optical circuits.

A band-pass plasmonic filter with dual-square ring resonator

2014 ◽  
Vol 28 (23) ◽  
pp. 1450188 ◽  
Author(s):  
Gaoyan Duan ◽  
Peilin Lang ◽  
Lulu Wang ◽  
Li Yu ◽  
Jinghua Xiao
Keyword(s):  
Ring Resonator ◽  
Band Pass Filter ◽  
The Finite Element Method ◽  
Pass Filter ◽  
Fem Method ◽  
Metal Insulator Metal ◽  
Integrated Optical ◽  
Potential Applications ◽  
Band Pass ◽  
Optical Circuits

In this paper, we show the simulation of a plasmonic band-pass filter which consists of two surface plasmon polaritons (SPPs) waveguides and a resonator in metal–insulator–metal (MIM) structure. The resonator is formed by two square rings and a patch between them. The patch is a tiny rectangle cavity in order to transfer the SPPs from one ring to the other. The finite element method (FEM) method is employed in simulation. The results show that the dual-ring resonator performs better than a single ring does. The 3 dB bandwidth near the peak wavelength λ = 1054 nm is merely 31.7 nm. The resonant wavelength can be shifted by changing the side length of the square ring. This narrow band-pass filter is easy to fabricate and has potential applications in future integrated optical circuits.

Active Silicon Integrated Optical Circuits

1997 ◽  
Vol 486 ◽  
Author(s):  
Tim D. Bestwick
Keyword(s):  
Integrated Optics ◽  
Single Mode ◽  
Major Product ◽  
Silicon On Insulator ◽  
Integrated Optics Devices ◽  
Silicon Waveguides ◽  
Integrated Optical ◽  
Hybrid Devices ◽  
Optical Circuits ◽  
Integrated Optical Circuits

AbstractActive Silicon integrated Optical Circuits (ASOC™) is a technology based on single-mode rib waveguides formed on silicon-on-insulator that is being used to manufacture commercial integrated optics components. Silicon waveguides have excellent properties for many applications in the 1.3 and 1.55 micron telecommunications bands including relatively low loss. An important aspect of ASOC™ technology is the development of a set of waveguide-based elements that can be assembled into practical integrated optics devices. The fundamental waveguide elements include bends, couplers and fiber-waveguide interfaces, and additional elements include doped structures and waveguide gratings. Discrete lasers and photodetectors are also incorporated into ASOC™ technology to form hybrid devices. The technology is being used to manufacture devices for applications in telecomunications and optical sensing, the first major product being a two-wavelength single-fiber bi-directional optical transceiver.

Tuning the Fano resonances in a single defect nanocavity coupled with a plasmonic waveguide for sensing applications

2015 ◽  
Vol 29 (33) ◽  
pp. 1550218 ◽  
Author(s):  
Tiesheng Wu ◽  
Yumin Liu ◽  
Zhongyuan Yu ◽  
Han Ye ◽  
Changgan Shu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Structural Parameters ◽  
Fdtd Method ◽  
Refractive Index Sensor ◽  
Fano Resonances ◽  
Refractive Index Sensitivity ◽  
Absorbing Boundary ◽  
Single Defect ◽  
Sensing Applications ◽  
Metal Insulator Metal

A novel surface plasmon polaritons (SPPs) refractive index sensor based on a single defect nanocavity coupled with a metal–insulator–metal (MIM) waveguide is proposed and numerically simulated by using the finite difference time domain (FDTD) method with perfectly matched layer absorbing boundary condition. It is found that the defect structure can realize two Fano resonances and these two Fano resonances originate from two different mechanisms. The results demonstrate the liner correlation between the resonance wavelengths of the device and the refractive index of the material under sensing. Through the optimization of structural parameters, we achieve a theoretical value of the refractive index sensitivity as high as 1800.4 nmRIU[Formula: see text]. It could be utilized to develop ultra-compact nanodevice for high-resolution biological sensing.

Tunable power splitter based on MIM waveguide-rectangle cavity system with Kerr material

2016 ◽  
Vol 30 (31) ◽  
pp. 1650376
Author(s):  
Fang Chen ◽  
Yiping Xu
Keyword(s):  
Fdtd Method ◽  
Coupled System ◽  
Nonlinear Material ◽  
Fdtd Simulation ◽  
Power Splitter ◽  
Coupled Mode ◽  
Integrated Optical ◽  
Cavity System ◽  
Control Light ◽  
Optical Circuits

A tunable power splitter based on metal-dielectric metal (MDM) waveguide coupled with rectangle cavity with Kerr nonlinear material is proposed. The power splitter properties are simulated by the finite-difference time-domain (FDTD) method [Y. H. Guo et al., Opt. Express 19 (2011) 13831–13838]. Simple theoretically analysis and numerically calculation demonstrate that the waveguide-rectangle cavity coupled system performs a tunable plasmonic power splitter. Additionally, the output power ratio can be efficiency tuned by varying the control light intensity. Results obtained by the coupled mode theory are consistent with those from the FDTD simulation. The plasmonic splitter may become a choice for the highly integrated optical circuits.

scholarly journals Plasmonic Narrowband Filter Based on an Equilateral Triangular Resonator with a Silver Bar

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 244
Author(s):  
Jingyu Zhang ◽  
Hengli Feng ◽  
Yang Gao
Keyword(s):  
Quality Factor ◽  
Structural Parameters ◽  
Fdtd Method ◽  
Wave Theory ◽  
Resonance Wavelength ◽  
Fano Resonances ◽  
Coupled Mode ◽  
Metal Insulator Metal ◽  
Quality Factor Q ◽  
Narrowband Filter

A kind of plasmonic structure consisted of an equilateral triangle-shaped cavity (ETSC) and a metal-insulator-metal (MIM) waveguide is proposed to realize triple Fano resonances. Numerically simulated by the finite difference time domain (FDTD) method, Fano resonances inside the structure are also explained by the coupled mode theory (CMT) and standing wave theory. For further research, inverting ETSC could dramatically increase quality factor to enhance resonance wavelength selectivity. After that, a bar is introduced into the ETSC and the inverted ETSC to increase resonance wavelengths through changing the structural parameters of the bar. In addition, working as a highly efficient narrowband filter, this structure owes a good sensitivity (S = 923 nm/RIU) and a pretty high-quality factor (Q = 322) along with a figure of merit (FOM = 710). Additionally, a narrowband peak with 1.25 nm Full-Width-Half-Maximum (FWHM) can be obtained. This structure will be used in highly integrated optical circuits in future.

Dispersion properties of single-mode optical fibers in telecommunication region: poly (methyl methacrylate) (PMMA) versus silica

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Hassan Pakarzadeh ◽  
Seyed Mostafa Rezaei ◽  
Mostafa Taghizadeh ◽  
Forough Bozorgzadeh
Keyword(s):  
Methyl Methacrylate ◽  
Optical Fibers ◽  
Spectral Range ◽  
Structural Parameters ◽  
Practical Importance ◽  
Single Mode ◽  
Dispersion Characteristics ◽  
Poly Methyl Methacrylate ◽  
Dispersion Wavelength ◽  
Zero Dispersion Wavelength

AbstractIn this paper, the dispersion characteristics of two standard single-mode optical fibers (SMFs), fabricated with silica and poly (methyl methacrylate) (PMMA) are studied in telecommunication spectral regions. The effect of structural parameters, such as the radius of the fiber core and the relative core-cladding index difference, is numerically investigated. It is found that over whole spectral range, the PMMA-based SMF shows lower dispersion than the silica SMF. Also, the zero-dispersion wavelength (ZDW) of PMMA-based SMF is longer than that of silica fiber. The results may be of practical importance for the telecommunication applications.

scholarly journals A Plasmonic Refractive-Index Sensor Based Multiple Fano Resonance Multiplexing in Slot-Cavity Resonant System

2021 ◽  
Author(s):  
Zicong Guo ◽  
Kunhua Wen ◽  
Yuwen Qin ◽  
Yihong Fang ◽  
Zhengfeng Li ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Fdtd Method ◽  
Rectangular Cavity ◽  
Refractive Index Sensor ◽  
Right Wing ◽  
Left Wing ◽  
Resonant System ◽  
Coupled Mode ◽  
Metal Insulator Metal ◽  
The Right

AbstractIn this paper, a sub-wavelength metal-insulator-metal (MIM) waveguide structure is proposed by using a cross-shape rectangular cavity, of which wings are coupled with two rectangular cavities. Firstly, a cross-shape rectangular cavity is placed between the input and output MIM waveguides. According to the mutual interference between bright and dark modes, three Fano resonant peaks are generated. Secondly, by adding a rectangular cavity on the left wing of the cross shaped one, five asymmetric Fano resonance peaks are obtained. Thirdly, six asymmetric Fano resonance peaks are achieved after adding another cavity on the right wing. Finally, the finite-difference-time-domain (FDTD) method and multimode interference coupled-mode theory (MICMT) are used to simulate and analyze the coupled plasmonic resonant system, respectively. The highest sensitivity of 1 000nm/RIU is achieved.

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