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Related Experiment Video

Updated: Aug 30, 2025

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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High-efficiency second-harmonic generation in coupled nano Fabry-Perot thin resonators.

Tomasz Matthia, Baptiste Fix, Léna Soun

    Optics Letters
    |September 1, 2022
    PubMed
    Summary

    Researchers enhanced second-harmonic generation (SHG) in plasmonic nanostructures on GaAs. This advancement achieved high conversion efficiencies for infrared light, paving the way for new photonic devices.

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    Area of Science:

    • Photonics and Nanotechnology
    • Nonlinear Optics
    • Materials Science

    Background:

    • Second-harmonic generation (SHG) is a key nonlinear optical process.
    • Plasmonic nanostructures offer unique light-matter interaction properties.
    • Enhancing SHG in the infrared spectrum is crucial for various applications.

    Purpose of the Study:

    • To experimentally demonstrate enhanced SHG in 1D periodic plasmonic nanostructures on Gallium Arsenide (GaAs).
    • To investigate the role of coupled Fabry-Perot nanoresonators in SHG enhancement.
    • To explore the tunability of SHG enhancement by engineering nanoantenna dimensions.

    Main Methods:

    • Fabrication of thin 1D periodic plasmonic nanostructures on a GaAs substrate.
    • Experimental characterization of SHG efficiency in the infrared spectral range.

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  • Design and simulation of coupled horizontal Fabry-Perot nanoresonators within the nanostructures.

    • Main Results:

    • Achieved SHG conversion efficiencies up to the 10-7 W-1 range.
    • Demonstrated significant SHG enhancement due to the designed nanostructure coupling.
    • Showcased tunability of SHG enhancement for pump wavelengths from 2.8 µm to 3.3 µm through nanoantenna dimension engineering.

    Conclusions:

    • 1D periodic plasmonic nanostructures on GaAs are effective for enhancing infrared SHG.
    • Coupled Fabry-Perot nanoresonators play a critical role in achieving high conversion efficiencies.
    • The demonstrated tunability offers potential for developing novel infrared photonic devices.