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Frequency-Upconversion Single-Mode Lasing in CsPbBr3 Nanowires at Room Temperature.

Junfeng Lu1,2, Long Yuan1,2,3, Wenjie Deng1,2

  • 1College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, PR China.

ACS Nano
|August 9, 2025
PubMed
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This summary is machine-generated.

High-quality cesium lead halide perovskite nanowires enable efficient frequency upconversion lasing. This breakthrough offers a new platform for nonlinear optoelectronic devices and advanced imaging technologies.

Area of Science:

  • Materials Science
  • Optics
  • Nanoscience

Background:

  • Frequency upconversion is a key nonlinear optical process for wavelength shifting.
  • Achieving efficient upconversion requires materials with exceptional optical properties.
  • Cesium lead halide perovskites are promising candidates for optoelectronic applications.

Purpose of the Study:

  • To synthesize high-quality cesium lead bromide (CsPbBr3) nanowires.
  • To demonstrate frequency-upconversion single-mode lasing in CsPbBr3 nanowires.
  • To explore the potential of these nanowires in nonlinear optoelectronic devices.

Main Methods:

  • Antisolvent method for synthesizing CsPbBr3 nanowires.
  • Femtosecond pulse laser excitation at 390 nm and 800 nm.
Keywords:
CsPbBr3 nanowireFabry−Perot cavityfrequency upconversionlow thresholdsingle-mode lasing

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  • Characterization of lasing properties, including threshold and polarization.

    • Main Results:

    • Highly polarized single-photon lasing achieved with a low threshold (6.69 μJ/cm2).
    • Successful room-temperature frequency-upconversion single-mode lasing demonstrated in a 3.5 μm CsPbBr3 nanowire.
    • CsPbBr3 nanowires function as both optical gain medium and resonant cavity.

    Conclusions:

    • All-inorganic perovskite nanowires are excellent gain media for frequency-upconversion lasers.
    • This provides a versatile platform for nonlinear optoelectronic devices.
    • Potential applications include optical switches, limiters, and biomedical imaging.