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Related Experiment Videos

Second-harmonic generation in a metal-clad nonlinear optical waveguide.

Shijie Liu, Jianfeng Shang, Yuanlin Zheng

    Optics Express
    |April 7, 2017
    PubMed
    Summary
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    We demonstrate a new phase-matching method for second-harmonic generation (SHG) in symmetrical metal-cladding optical waveguides (SMCOWs). This technique uses ultrahigh order modes to achieve efficient nonlinear frequency conversion in integrated photonics.

    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics
    • Nonlinear Optics

    Background:

    • Efficient optical nonlinear effects are crucial for integrated photonic devices.
    • Waveguide dispersion must be carefully engineered for phase-matching interacting waves.
    • Second-harmonic generation (SHG) is a key nonlinear optical process.

    Purpose of the Study:

    • To demonstrate a novel phase-matching process for SHG in a symmetrical metal-cladding optical waveguide (SMCOW).
    • To enable tunable phase-matching for nonlinear frequency conversion in integrated photonic systems.

    Main Methods:

    • Utilizing ultrahigh order modes in SMCOWs with small propagation constants.
    • Employing free-space coupling to actively tune phase-matching conditions.

    Related Experiment Videos

  • Developing and experimentally verifying a theoretical model for SHG in SMCOWs.

    • Main Results:

    • Achieved efficient second-harmonic generation through a novel phase-matching mechanism.
    • Demonstrated active tuning of phase-matching conditions via free-space coupling.
    • Experimentally validated the theoretical model for SHG in the designed SMCOW structure.

    Conclusions:

    • The proposed phase-matching process in SMCOWs is effective for efficient SHG.
    • This mechanism offers a versatile approach for nonlinear frequency conversion in integrated photonics.
    • The method can be extended to other nonlinear optical processes.