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Frequency dependent wave routing based on dual-band valley-Hall topological photonic crystal

التفاصيل البيبلوغرافية
العنوان: Frequency dependent wave routing based on dual-band valley-Hall topological photonic crystal
المؤلفون: Guo-Chao Wei, Zhen-Zhen Liu, Da-Sen Zhang, Jun-Jun Xiao
المصدر: New Journal of Physics, Vol 23, Iss 2, p 023029 (2021)
بيانات النشر: IOP Publishing, 2021.
سنة النشر: 2021
المجموعة: LCC:Science
LCC:Physics
مصطلحات موضوعية: valley-Hall topological photonic crystal, valley edge states, frequency dependent wave routing, dual-band, Science, Physics, QC1-999
الوصف: Previous studies on the propagation direction of valley topological edge states mainly focus on the matching between orbital angular momentum of the excitation source and specific pseudo-spin state of valley edge mode at certain frequency that falls in the bandgap of the topologically distinct bulk components. In this work, we propose topological photonic crystals (PCs) hosting two topological protected bandgaps. It is shown that by constructing the interface between different PC structures with distinct topological phase, edge states can be engineered inside these two bandgaps, which provides a convenient way to achieve flexible wave routing. Particularly, we study three types of meta-structures consisting of these PCs in which the valley edge states routing path highly depends on the operating frequency and inputting port of the excitation source. Our study provides an alternative way in designing topological devices such as wave splitters and frequency division devices.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1367-2630
Relation: https://doaj.org/toc/1367-2630
DOI: 10.1088/1367-2630/abe335
URL الوصول: https://doaj.org/article/4db84603ff6e4d9a92383720caea09a3
رقم الأكسشن: edsdoj.4db84603ff6e4d9a92383720caea09a3
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:13672630
DOI:10.1088/1367-2630/abe335