Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 39, Issue 15, Pages 5069-5073Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2021.3082558
Keywords
Photonics; Silicon; Couplings; Slabs; Optical waveguides; Lattices; Backscatter; Topological photonics; ring-resonator; filter
Funding
- Key Research and Development Program [2017YFA0303800]
- National Natural Science Foundation [91950119, 11634010, 61775183, 61905196]
- Key Research and Development Program in Shaanxi Province of China [2020JZ-10]
- Fundamental Research Funds for the Central Universities [310201911cx032, 3102019JC008]
- Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University [CX2020208]
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This study proposes and fabricates a topologically protected ring-resonator formed in valley photonic crystals on a silicon slab, demonstrating its unidirectional transmission and robustness against structure defects. Coupled with topological waveguides, the topological ring functions as notch and channel-drop filters, opening up a new avenue for developing advanced chip-integrated photonic circuits with attributes of topological photonics.
A topologically protected ring-resonator formed in valley photonic crystals is proposed and fabricated on a silicon slab. The unidirectional transmission and robustness against structure defects of its resonant modes are illustrated. Coupled with topological waveguides, the topological ring is functioned as notch and channel-drop filters. The work opens up a new avenue for developing advanced chip-integrated photonic circuits with attributes of topological photonics.
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