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Related Experiment Video

Updated: Jan 8, 2026

Fabrication and Testing of Photonic Thermometers
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Fabrication-friendly all-optical plasmonically-enhanced integrated phase-change photonic memory device.

Junchao Song, Joe Pady, Emanuele Gemo

    Optics Express
    |December 19, 2025
    PubMed
    Summary
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    Researchers explored fast, energy-efficient integrated photonic memory and computing devices using plasmonic structures and phase-change materials. These novel designs offer significant improvements in switching energy and speed for advanced optical computing applications.

    Area of Science:

    • Photonics and Materials Science
    • Nanotechnology and Device Engineering

    Background:

    • Integrated photonic devices require faster and more energy-efficient memory and computing solutions.
    • Plasmonic resonant structures offer nanoscale light-squeezing and electric-field enhancement.
    • Chalcogenide phase-change materials provide intrinsic tuneability for device operation.

    Purpose of the Study:

    • To explore the potential of combining plasmonic structures with phase-change materials for integrated photonic devices.
    • To design manufacturable devices with improved performance characteristics.
    • To investigate the switching energy and speed of these novel photonic memory and computing devices.

    Main Methods:

    • Utilizing finite-element thermo-optic computational models.
    • Employing bespoke phase-change computational models.

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  • Designing devices with plasmonic dimer-bar nanoantennas on phase-change cells integrated with photonic waveguides.

    • Main Results:

    • Achieved switching energies in the tens of pico-Joule range.
    • Demonstrated switching speeds in the tens of nanosecond range.
    • Showcased a favorable trade-off between device performance and fabrication complexity.

    Conclusions:

    • The integration of plasmonic structures and phase-change materials shows great promise for fast, energy-efficient photonic memory and computing.
    • The proposed device designs are readily manufacturable and offer significant performance enhancements over conventional approaches.
    • These findings pave the way for next-generation optical computing technologies.