采用混合等离子体波导的铌酸锂绝缘体上的小型宽带偏振分束器

IF 1.1 4区物理与天体物理 Q4 NANOSCIENCE & NANOTECHNOLOGY

Journal of Nanophotonics Pub Date : 2023-04-01 DOI:10.1117/1.JNP.17.026005

Jiakang Shi, D. Ge, Mengcheng Lv, Yujie Zhou, Guoxin Cui, Liqiang Zhang

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引用次数: 0

摘要

摘要提出了一种基于非对称定向耦合器的小型宽带极化分束器，该耦合器由铌酸锂绝缘体上的混合等离子体波导和脊波导组成。由于表面等离子体极化子(SPP)效应，横向电极化满足相位匹配条件，而横向磁极化存在明显的相位失配。设计了一种短(~ 28 μm长)的PBS，为了便于制作，间隙宽度选择为200 nm。数值模拟表明，所设计的PBS具有宽带宽(>130 nm)，消光比为>15 dB，并且对波导宽度的变化具有较大的制造公差(大于±50 nm)。

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Compact and broadband polarization beam splitter on lithium-niobate-on-insulator using a hybrid plasmonic waveguide

Abstract. A compact and broadband polarization beam splitter (PBS) is proposed based on an asymmetric directional coupler consisting of a hybrid plasmonic waveguide and a ridge waveguide on lithium-niobate-on-insulator. Due to the surface plasma polariton (SPP) effect, the phase-matching condition is satisfied for transverse electric polarization, whereas the transverse magnetic polarization has a significant phase mismatch by choosing reasonable widths of both waveguides. A short ( ∼ 28 μm long) PBS is designed while the gap width is chosen to be 200 nm to make it easy to fabricate. Numerical simulations show that the designed PBS has a broad bandwidth (>130 nm) for an extinction ratio of >15 dB and a large fabrication tolerance for the variation of the waveguide width (over ± 50 nm).

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来源期刊

Journal of Nanophotonics 工程技术-光学

CiteScore

2.60

自引率

6.70%

发文量

审稿时长

3 months

期刊介绍： The Journal of Nanophotonics publishes peer-reviewed papers focusing on the fabrication and application of nanostructures that facilitate the generation, propagation, manipulation, and detection of light from the infrared to the ultraviolet regimes.