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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
Summary
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.
- 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.
