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High transmission in 120-degree sharp bends of inversion-symmetric and inversion-asymmetric photonic crystal waveguides

Author

Listed:
  • Wei Dai

    (Tokyo Institute of Technology
    NTT Corporation)

  • Taiki Yoda

    (Tokyo Institute of Technology
    NTT Corporation)

  • Yuto Moritake

    (Tokyo Institute of Technology)

  • Masaaki Ono

    (NTT Corporation
    NTT Corporation)

  • Eiichi Kuramochi

    (NTT Corporation
    NTT Corporation)

  • Masaya Notomi

    (Tokyo Institute of Technology
    NTT Corporation
    NTT Corporation)

Abstract

Bending loss is one of the serious problems for constructing nanophotonic integrated circuits. Recently, many works reported that valley photonic crystals (VPhCs) enable significantly high transmission via 120-degree sharp bends. However, it is unclear whether the high bend-transmission results directly from the valley-photonic effects, which are based on the breaking of inversion symmetry. In this study, we conduct a series of comparative numerical and experimental investigations of bend-transmission in various triangular PhCs with and without inversion symmetry and reveal that the high bend-transmission is solely determined by the domain-wall configuration and independent of the existence of the inversion symmetry. Preliminary analysis of the polarization distribution indicates that high bend-transmissions are closely related to the appearance of local topological polarization singularities near the bending section. Our work demonstrates that high transmission can be achieved in a much wider family of PhC waveguides, which may provide novel designs for low-loss nanophotonic integrated circuits with enhanced flexibility and a new understanding of the nature of valley-photonics.

Suggested Citation

  • Wei Dai & Taiki Yoda & Yuto Moritake & Masaaki Ono & Eiichi Kuramochi & Masaya Notomi, 2025. "High transmission in 120-degree sharp bends of inversion-symmetric and inversion-asymmetric photonic crystal waveguides," Nature Communications, Nature, vol. 16(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-56020-8
    DOI: 10.1038/s41467-025-56020-8
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    1. Yongquan Zeng & Udvas Chattopadhyay & Bofeng Zhu & Bo Qiang & Jinghao Li & Yuhao Jin & Lianhe Li & Alexander Giles Davies & Edmund Harold Linfield & Baile Zhang & Yidong Chong & Qi Jie Wang, 2020. "Electrically pumped topological laser with valley edge modes," Nature, Nature, vol. 578(7794), pages 246-250, February.
    2. Xin-Tao He & En-Tao Liang & Jia-Jun Yuan & Hao-Yang Qiu & Xiao-Dong Chen & Fu-Li Zhao & Jian-Wen Dong, 2019. "A silicon-on-insulator slab for topological valley transport," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    3. Abhishek Kumar & Manoj Gupta & Prakash Pitchappa & Nan Wang & Pascal Szriftgiser & Guillaume Ducournau & Ranjan Singh, 2022. "Phototunable chip-scale topological photonics: 160 Gbps waveguide and demultiplexer for THz 6G communication," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    4. Xiaoxiao Wu & Yan Meng & Jingxuan Tian & Yingzhou Huang & Hong Xiang & Dezhuan Han & Weijia Wen, 2017. "Direct observation of valley-polarized topological edge states in designer surface plasmon crystals," Nature Communications, Nature, vol. 8(1), pages 1-9, December.
    5. Yuhao Kang & Xiang Ni & Xiaojun Cheng & Alexander B. Khanikaev & Azriel Z. Genack, 2018. "Pseudo-spin–valley coupled edge states in a photonic topological insulator," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
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