Journal
OPTICAL MATERIALS
Volume 81, Issue -, Pages 55-58Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2018.04.058
Keywords
Inorganic perovskite nanocrystals; Random laser; Plasmonic scattering; Two-photon pumping; Femtosecond pulses
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Funding
- National Natural Science Foundation of China [61575007]
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CsPbBr3 nanocrystals have attracted great interest owing to their high fluorescence quantum efficiency, adjustable photoluminescence wavelength, and good stability. We report a device that consists of disordered gold nanorods underneath a film of CsPbBr3 nanocrystals. Two-photon pumping using femtosecond laser pulses at 800 nm enables amplified spontaneous emission (ASE) at about 523 nm. In this work, a narrow peak with linewidth of 5 nm is observed when the pump fluence reaches a low threshold of 0.65 mJ/cm(2). The results show that plasmonic resonance of gold nanorods improves the emission transition rate and enables low threshold ASE.
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