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All-optical nonreciprocity due to valley polarization pumping in transition metal dichalcogenides

Author

Listed:
  • Sriram Guddala

    (City College of the City University of New York)

  • Yuma Kawaguchi

    (City College of the City University of New York)

  • Filipp Komissarenko

    (City College of the City University of New York)

  • Svetlana Kiriushechkina

    (City College of the City University of New York)

  • Anton Vakulenko

    (City College of the City University of New York)

  • Kai Chen

    (City College of the City University of New York
    Graduate Center of the City University of New York)

  • Andrea Alù

    (City College of the City University of New York
    Graduate Center of the City University of New York
    City University of New York)

  • Vinod M. Menon

    (Graduate Center of the City University of New York
    City College of New York)

  • Alexander B. Khanikaev

    (City College of the City University of New York
    Graduate Center of the City University of New York
    City College of New York)

Abstract

Nonreciprocity and nonreciprocal optical devices play a vital role in modern photonic technologies by enforcing one-way propagation of light. Here, we demonstrate an all-optical approach to nonreciprocity based on valley-selective response in transition metal dichalcogenides (TMDs). This approach overcomes the limitations of magnetic materials and it does not require an external magnetic field. We provide experimental evidence of photoinduced nonreciprocity in a monolayer WS2 pumped by circularly polarized (CP) light. Nonreciprocity stems from valley-selective exciton population, giving rise to nonlinear circular dichroism controlled by CP pump fields. Our experimental results reveal a significant effect even at room temperature, despite considerable intervalley-scattering, showing promising potential for practical applications in magnetic-free nonreciprocal platforms. As an example, here we propose a device scheme to realize an optical isolator based on a pass-through silicon nitride (SiN) ring resonator integrating the optically biased TMD monolayer.

Suggested Citation

  • Sriram Guddala & Yuma Kawaguchi & Filipp Komissarenko & Svetlana Kiriushechkina & Anton Vakulenko & Kai Chen & Andrea Alù & Vinod M. Menon & Alexander B. Khanikaev, 2021. "All-optical nonreciprocity due to valley polarization pumping in transition metal dichalcogenides," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24138-0
    DOI: 10.1038/s41467-021-24138-0
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    Cited by:

    1. Junting Liu & Fang Yang & Junpeng Lu & Shuai Ye & Haowen Guo & Hongkun Nie & Jialin Zhang & Jingliang He & Baitao Zhang & Zhenhua Ni, 2022. "High output mode-locked laser empowered by defect regulation in 2D Bi2O2Se saturable absorber," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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