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

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-04-01 DOI:10.1117/1.JNP.17.026005

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

引用次数: 0

Abstract

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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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

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)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.