scholarly journals A Triangle Hybrid Plasmonic Waveguide with Long Propagation Length for Ultradeep Subwavelength Confinement

Crystals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 64
Author(s):  
Qian Zhang ◽  
Jinbin Pan ◽  
Shulong Wang ◽  
Yongqian Du ◽  
Jieyu Wu
Keyword(s):  
Plasmonic Waveguide ◽  
Ohmic Loss ◽  
Plasmonic Waveguides ◽  
Propagation Length ◽  
Silicon Waveguide ◽  
Hybrid Plasmonic Waveguide ◽  
Light Waves ◽  
Fabrication Errors ◽  
Application Fields ◽  
Mode Area

Facing the problems of ohmic loss and short propagation length, the application of plasmonic waveguides is limited. Here, a triangle hybrid plasmonic waveguide is introduced, where a cylinder silicon waveguide is separated from the triangle prism silver waveguide by a nanoscale silica gap. The process of constant optimization of waveguide structure is completed and simulation results indicate that the propagation length could reach a length of 510 μm, and the normalized mode area could reach 0.03 along with a high figure of merit 3150. This implies that longer propagation length could be simultaneously achieved along with relatively ultra-deep subwavelength mode confinement due to the hybridization between metallic plasmon polarization mode and silicon waveguide mode, compared with previous study. By an analysis of fabrication errors, it is confirmed that this waveguide is fairly stable over a wide error range. Additionally, the excellent performance of this is further proved by the comparison with other hybrid plasmonic waveguides. Our work is significant to manipulate light waves at sub-wavelength dimensions and enlarge the application fields, such as light detection and photoelectric sensors, which also benefit the improvement of the integration of optical devices.

scholarly journals Broadband coupler between silicon waveguide and hybrid plasmonic waveguide

2010 ◽  
Vol 18 (12) ◽  
pp. 13173 ◽  
Author(s):  
Yi Song ◽  
Jing Wang ◽  
Qiang Li ◽  
Min Yan ◽  
Min Qiu
Keyword(s):  
Plasmonic Waveguide ◽  
Silicon Waveguide ◽  
Hybrid Plasmonic Waveguide

scholarly journals Theoretical Investigation of an Air-Slot Mode-Size Matcher between Dielectric and MDM Plasmonic Waveguides

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Rami A. Wahsheh
Keyword(s):  
Dielectric Waveguide ◽  
Data Transfer ◽  
Coupling Efficiency ◽  
Large Data ◽  
Fabrication Process ◽  
Plasmonic Waveguide ◽  
Plasmonic Waveguides ◽  
Frequency Range ◽  
Silicon Waveguide ◽  
Mode Size

Hybrid integration of dielectric and plasmonic waveguides is necessary to reduce the propagation losses due to the metallic interactions and support of nanofabrication of plasmonic devices that deal with large data transfer. In this paper, we propose a direct yet efficient, very short air-slot coupler (ASC) of a length of 36 nm to increase the coupling efficiency between a silicon waveguide and a silver-air-silver plasmonic waveguide. Our numerical simulation results show that having the ASC at the interface makes the fabrication process much easier and ensures that light couples from a dielectric waveguide into and out of a plasmonic waveguide. The proposed coupler works over a broad frequency range achieving a coupling efficiency of 86% from a dielectric waveguide into a metal-dielectric-metal (MDM) plasmonic waveguide and 68% from a dielectric waveguide to an MDM plasmonic waveguide and back into another dielectric waveguide. In addition, we show that even if there are no high-precision fabrication techniques, light couples from a conventional dielectric waveguide (CDW) into an MDM plasmonic waveguide as long as there is an overlap between the CDW and ASC, which reduces the fabrication process tremendously. Our proposed coupler has an impact on the miniaturization of ultracompact nanoplasmonic devices.

Tuning SPP propagation length of hybrid plasmonic waveguide by manipulating evanescent field

2020 ◽  
Vol 462 ◽  
pp. 125335 ◽  
Author(s):  
Nguyen Thanh Huong ◽  
Nguyen Duy Vy ◽  
Minh-Tuan Trinh ◽  
Chu Manh Hoang
Keyword(s):  
Evanescent Field ◽  
Plasmonic Waveguide ◽  
Propagation Length ◽  
Hybrid Plasmonic Waveguide

scholarly journals Graphene Electro-Optical Switch Modulator by Adjusting Propagation Length Based on Hybrid Plasmonic Waveguide in Infrared Band

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2864 ◽  
Author(s):  
Ming Cai ◽  
Shulong Wang ◽  
Zhihong Liu ◽  
Yindi Wang ◽  
Tao Han ◽  
...  
Keyword(s):  
Near Infrared ◽  
Modulation Depth ◽  
Optical Switch ◽  
Incident Light ◽  
Plasmonic Waveguide ◽  
Infrared Band ◽  
Propagation Length ◽  
Sio2 Substrate ◽  
Hybrid Plasmonic Waveguide ◽  
High Modulation

A modulator is the core of many optoelectronic applications such as communication and sensing. However, a traditional modulator can hardly reach high modulation depth. In order to achieve the higher modulation depth, a graphene electro-optical switch modulator is proposed by adjusting propagation length in the near infrared band. The switch modulator is designed based on a hybrid plasmonic waveguide structure, which is comprised of an SiO2 substrate, graphene–Si–graphene heterostructure, Ag nanowire and SiO2 cladding. The propagation length of the hybrid plasmonic waveguide varies from 0.14 μm to 20.43 μm by the voltage tunability of graphene in 1550 nm incident light. A modulator with a length of 3 μm is designed based on the hybrid waveguide and it achieves about 100% modulation depth. The lower energy loss (~1.71 fJ/bit) and larger 3 dB bandwidth (~83.91 GHz) are attractive for its application in a photoelectric integration field. In addition, the excellent robustness (error of modulation effects lower than 8.84%) is practical in the fabrication process. Most importantly, by using the method of adjusting propagation length, other types of graphene modulators can also achieve about 100% modulation depth.

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