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Robust Subwavelength Single-Mode Perovskite Nanocuboid Laser
Zhengzheng Liu1,2,3, Jie Yang4, Juan Du1
1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics , Chinese Academy of Sciences , Shanghai 201800 , China.
ACS Nano
|May 11, 2018
Summary
Researchers developed subwavelength-scale perovskite nanocuboid lasers, achieving room-temperature lasing with low thresholds. These miniaturized lasers offer stable performance and temperature insensitivity for on-chip photonic devices.
Area of Science:
- Materials Science
- Optics and Photonics
- Nanotechnology
Background:
- Miniaturization of optical components is crucial for on-chip photonic information processing.
- Conventional dielectric lasers face limitations in achieving subwavelength dimensions due to cavity length and optical gain requirements.
Purpose of the Study:
- To demonstrate three-dimensional subwavelength lasing using individual perovskite nanocuboids.
- To investigate the lasing performance and temperature stability of these nanoscale lasers.
Main Methods:
- Fabrication of CsPbBr3 perovskite nanocuboids with dimensions around 400 nm.
- Characterization of Fabry-Pérot lasing under one- and two-photon excitation at room temperature.
- Evaluation of temperature-insensitive properties across a range of 180–380 K.
Main Results:
- Achieved single-mode Fabry-Pérot lasing in CsPbBr3 nanocuboid lasers with dimensions of approximately 0.49λ³.
- Demonstrated low lasing thresholds (40.2 μJ/cm² for one-photon, 374 μJ/cm² for two-photon excitation).
- Observed high quality factors (2075 and 1859) and temperature-insensitive lasing performance.
Conclusions:
- CsPbBr3 nanocuboid lasers represent a significant advancement in miniaturizing lasers to the subwavelength scale.
- Their stable room-temperature lasing, frequency up-conversion, and temperature insensitivity are promising for integrated nanolasers and photonic devices.
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