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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
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Hybrid Nanowire-Rectangular Plasmonic Waveguide for Subwavelength Confinement at 1550 Nm
Yindi Wang1, Hongxia Liu1, Shulong Wang1
1Key Laboratory for Wide Band Gap Semiconductor Materials and Devices of Education Ministry, School of Microelectronics, Xidian University, Xi'an 710071, China.
Micromachines
|July 27, 2022
Summary
This study introduces a novel hybrid waveguide using silver nanowires and silicon for enhanced light transmission. The plasmonic waveguide achieves ultra-long distances and subwavelength sizes, ideal for integrated optics.
Area of Science:
- Photonics and Nanotechnology
- Optoelectronics
- Materials Science
Background:
- Surface Plasmon Polaritons (SPPs) offer unique light confinement properties.
- Integrating plasmonic and dielectric waveguides is challenging but promising for miniaturization.
- Existing waveguides often struggle with transmission length and manufacturing tolerances.
Purpose of the Study:
- To design and analyze a novel hybrid waveguide structure.
- To leverage strong coupling between SPP and Si waveguide modes.
- To achieve subwavelength dimensions with excellent optical performance.
Main Methods:
- A hybrid waveguide model comprising silver (Ag) nanowires and a silicon (Si) waveguide was proposed.
- Simulations focused on the 1550 nm wavelength, analyzing mode coupling and transmission characteristics.
- Key parameters such as effective modal area and transmission distance were evaluated.
Main Results:
- The hybrid waveguide demonstrated an ultra-long transmission distance of 270 µm.
- A normalized effective mode area of 0.01 was achieved, indicating strong light confinement.
- The waveguide exhibited a subwavelength cross-sectional size (500 nm × 500 nm) and robustness against manufacturing errors.
Conclusions:
- The proposed Ag nanowire/Si hybrid waveguide offers superior performance for light transmission.
- Its subwavelength size and error tolerance make it highly suitable for optoelectronic integrated circuits.
- This design presents a significant advancement for future photonic device development.
