Topological beam splitter based on 2D PC with different beam splitting angles

被引：0

作者：

Li, Yongqiang ^{[1
]}

Ma, Youjun ^{[1
]}

Ju, Cheng ^{[1
]}

Li, Changhong ^{[1
]}

机构：

[1] Qingdao Univ, Coll Elect & Informat, Qingdao 266071, Peoples R China

来源：

OPTICS EXPRESS | 2024年 / 32卷 / 21期

基金：

中国国家自然科学基金;

关键词：

EDGE STATES;

D O I：

10.1364/OE.534633

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photonic devices are prone to reflection losses at defects and corners. Topological photonics proposes robustness of transmission to improve transmission efficiency. In this work, a dielectric photonic crystal structure based on the quantum spin Hall effect is proposed, which has a large topological bandwidth. The transmission characteristics and robustness of the topological boundary state are verified by simulation, and designed and analyzed a topological beam splitter with a beam splitting channel of 60 degrees + 30 degrees. The system has good light transmission stability, suppression of scattering, and defect immunity. Numerical analysis shows that the minimum transmission loss is 0.23 dB, while in the case of power equalization the minimum transmission loss is 0.29 dB. The structure has promising applications in the field of all-optical integrated circuits and is expected to promote the practical use of photonic topological insulators in the field of communications. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

引用

页码：37285 / 37294

页数：10

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