Propagation properties of a modified surface plasmonic waveguide with an arc slot
Propagation properties of a modified surface plasmonic waveguide with an arc slot
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DOI：
10.1088/1674-1056/18/6/068
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发表时间：
2009-06
影响因子：
1.7
通讯作者：
Xue Wen-rui;Guo Ya-nan;Zhang Wen-mei
中科院分区：
文献类型：
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作者：
Xue Wen-rui;Guo Ya-nan;Zhang Wen-mei
介绍了一种带弧槽的表面等离子体波导。利用有限差分频域（FDFD）方法分析了该波导支撑的对称模的能量通量密度分布、有效折射率、传播长度和模面积与几何参数和工作波长的关系。结果表明：能量通量密度主要分布在由两个圆弧组成的四个角上，距离圆弧越近，能量通量密度越强；表面等离子体波导的宽度、厚度、圆弧半径以及工作波长等几何参数对有效折射率、传输长度和模面积都有影响。研究表明，弧槽表面等离子体波导比直槽表面等离子体波导具有更好的传播性能。本研究为槽面等离子波导在集成光子学中的应用提供了理论依据。
We introduce a modified surface plasmonic waveguide with an arc slot. The dependences of distribution of energy flux density, effective index, propagation length and mode area of the symmetric mode supported by this waveguide on geometrical parameters and working wavelength are analysed by using the finite-difference frequency-domain (FDFD) method. Results show that the energy flux density distributes mainly in four corners which are formed by two arcs, and the closer to the corners it is, the stronger the energy flux density will be. The effective index, the propagation length and the mode area are influenced by geometrical parameters, including the width, the thickness and the arc radius of the surface plasmonic waveguide, as well as the working wavelength. It has been shown that the surface plasmonic waveguide with an arc slot has better propagation properties than the surface plasmonic waveguide with a straight slot. This work may be helpful for applying the slot surface plasmonic waveguide to integrated photonics.