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Phototunable chip-scale topological photonics: 160 Gbps waveguide and demultiplexer for THz 6G communication

Author

Listed:
  • Abhishek Kumar

    (Nanyang Technological University
    Nanyang Technological University)

  • Manoj Gupta

    (Nanyang Technological University
    Nanyang Technological University)

  • Prakash Pitchappa

    (Agency for Science, Technology and Research (A*STAR))

  • Nan Wang

    (Agency for Science, Technology and Research (A*STAR))

  • Pascal Szriftgiser

    (Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM UMR 8523))

  • Guillaume Ducournau

    (IEMN—Institut d’Electronique de Microélectronique et de Nanotechnologie)

  • Ranjan Singh

    (Nanyang Technological University
    Nanyang Technological University)

Abstract

The revolutionary 5G cellular systems represent a breakthrough in the communication network design to provide a single platform for enabling enhanced broadband communications, virtual reality, autonomous driving, and the internet of everything. However, the ongoing massive deployment of 5G networks has unveiled inherent limitations that have stimulated the demand for innovative technologies with a vision toward 6G communications. Terahertz (0.1-10 THz) technology has been identified as a critical enabler for 6G communications with the prospect of massive capacity and connectivity. Nonetheless, existing terahertz on-chip communication devices suffer from crosstalk, scattering losses, limited data speed, and insufficient tunability. Here, we demonstrate a new class of phototunable, on-chip topological terahertz devices consisting of a broadband single-channel 160 Gbit/s communication link and a silicon Valley Photonic Crystal based demultiplexer. The optically controllable demultiplexing of two different carriers modulated signals without crosstalk is enabled by the topological protection and a critically coupled high-quality (Q) cavity. As a proof of concept, we demultiplexed high spectral efficiency 40 Gbit/s signals and demonstrated real-time streaming of uncompressed high-definition (HD) video (1.5 Gbit/s) using the topological photonic chip. Phototunable silicon topological photonics will augment complementary metal oxide semiconductor (CMOS) compatible terahertz technologies, vital for accelerating the development of futuristic 6G and 7G communication era driving the real-time terabits per second wireless connectivity for network sensing, holographic communication, and cognitive internet of everything.

Suggested Citation

  • 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.
  • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32909-6
    DOI: 10.1038/s41467-022-32909-6
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    References listed on IDEAS

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    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.
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