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Room-temperature two-dimensional plasmonic crystal semiconductor lasers.

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    Room-temperature plasmonic-crystal lasers using gold nano-pillars on InGaAs/GaAs quantum wells show tunable wavelengths from 865-1001 nm. These lasers exhibit narrow linewidths and low thresholds, paving the way for electrically-driven applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Nanotechnology

    Background:

    • Plasmonic-crystal lasers offer potential for miniaturized and efficient light sources.
    • Achieving room-temperature operation with low thresholds is crucial for practical applications.

    Purpose of the Study:

    • To demonstrate room-temperature plasmonic-crystal lasers.
    • To investigate wavelength tunability and optical properties.
    • To explore the potential for electrically-driven devices.

    Main Methods:

    • Fabrication of square-lattice gold nano-pillar arrays on InGaAs/GaAs quantum wells.
    • Tuning the lasing wavelength by adjusting the lattice period.
    • Characterization of laser performance, including threshold, linewidth, and divergence.

    Main Results:

    • Demonstrated room-temperature plasmonic-crystal lasers operating between 865-1001 nm.
    • Achieved wavelength tunability by varying the lattice period.
    • Observed narrow linewidth, small divergence angle, and a low threshold due to a mirror cavity effect.

    Conclusions:

    • Room-temperature plasmonic-crystal lasers are feasible with tunable wavelengths.
    • The observed mirror cavity effect enables low-threshold operation.
    • These lasers hold significant potential for future electrically-driven photonic devices.