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.

Study the Coupled-Cavity Waveguides Photonic Crystal Power Splitter

2014 ◽  
Vol 900 ◽  
pp. 222-225 ◽  
Author(s):  
Yan Bin Chen ◽  
Xu Ming Xu ◽  
Wei Li
Keyword(s):  
Photonic Crystal ◽  
Electromagnetic Waves ◽  
High Speed ◽  
Optical Signals ◽  
Power Splitter ◽  
Guided Mode ◽  
Propagation Analysis ◽  
Integrated Optical ◽  
Optical Circuits ◽  
Coupled Cavity

We propose a photonic crystal power splitter that allows the electromagnetic waves with a phase shift of 1800between output signals. The splitter consists of two parallel coupled-cavity waveguides placed in proximity. On the basis of the guided mode propagation analysis method, the self-imaging effect is discussed for the case of symmetric incidence. The finite-difference time-domain method is used to simulate the propagation of the beam and experimentally demonstrated. The results show that both output paths have the same physical length, the two output signals are synchronized. The splitter is very attractive for splitting high-speed optical signals in integrated optical circuits.

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.

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.

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.

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.

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