基于有限元的低损耗钠等离子体波导研究

IF 3.3 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2024-08-01 DOI:10.1007/s11468-024-02457-4

Xiaodi Yang, Shuaiqi Ma, Da Teng

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引用次数: 0

摘要

设计了一种钠基混合质子波导，由 Na 薄膜和楔形硅脊波导组成。利用有限元法（FEM）研究了波导的整体性能及其作为纳米激光器的应用，重点研究了有效指数、传播长度、归一化模式面积、优点系数、场约束因子、增益阈值和珀塞尔因子。结果表明，所设计的波导具有很强的场约束能力和很高的优越性。特别是同时获得了 536 的高珀赛尔因子和 0.066 μm-1 的超低增益阈值，远小于传统的银基等离子体波导。该波导有望推动钠基等离子波导在纳米激光、谐振器、调制器和其他纳米光子器件领域的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

An Investigation of Low-Loss Sodium Plasmon Waveguides Based on FEM

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An Investigation of Low-Loss Sodium Plasmon Waveguides Based on FEM

A sodium-based hybrid plasmonic waveguide consists of the Na film and wedge-shape Si ridge waveguide is designed. The overall performance of the waveguide and its application as a nano-laser are studied by using the finite element method (FEM) with emphasis on effective index, propagation length, normalized mode area, figure of merit, confinement factor, gain threshold, and Purcell factor. The results point out that the designed waveguide exhibits the strong field confinement ability as well as high figure of merit. Particularly, a large Purcell factor of 536 and an ultra-low gain threshold of 0.066 μm⁻¹ could be concurrently obtained, which is far smaller than that of conventional Ag-based plasmonic waveguides. The proposed waveguide could potentially advance the utilization of sodium-based plasmonic waveguides in the field of nano-laser, resonator, modulator, and other nanophotonic devices.

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.