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Related Experiment Video

Updated: Feb 25, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Cladding-free efficiently tunable nanobeam cavity with nanotentacles.

Jianhao Zhang, Sailing He

    Optics Express
    |August 9, 2017
    PubMed
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    We developed a novel cladding-free nanobeam cavity using silicon nanotentacles for efficient light-matter interaction. This design offers a wide tuning range and simple fabrication, outperforming previous methods for applications in sensing and lasers.

    Area of Science:

    • Photonics
    • Nanotechnology
    • Materials Science

    Background:

    • High-quality factor (Q) optical cavities are crucial for light-matter interaction.
    • Existing tunable cavities often require complex fabrication or have limited performance.
    • Nanotentacle structures offer unique thermal and optical properties.

    Purpose of the Study:

    • To propose and investigate a cladding-free, tunable nanobeam cavity using subwavelength-period nanotentacles (NT).
    • To evaluate the cavity's performance, including tuning range, switching rate, and response time.
    • To explore directional heat transfer and potential applications.

    Main Methods:

    • Fabrication of a cladding-free nanobeam cavity integrated with silicon nanotentacles.
    • Experimental characterization of the cavity's optical and thermal properties.

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  • Theoretical modeling to predict enhanced tuning capabilities.

    • Main Results:

    • Achieved a wavelength tuning range of over 6 nm with a switching rate of 10 KHz and 13 μs rising time.
    • Demonstrated excellent heat transfer properties of Si nanotentacles for efficient tuning (24mW power).
    • Proposed a theoretical 12nm tuning range by modifying the silicon structure.

    Conclusions:

    • The proposed nanotentacle-based nanobeam cavity offers superior performance and a simpler fabrication process compared to existing technologies.
    • The cladding-free design minimizes impact on cavity performance and enables waveguide functionality.
    • This technology is suitable for applications like sensing, particle trapping, cavity quantum electrodynamics (CQED), and hybrid lasers.