期刊
OPTICAL MATERIALS
卷 81, 期 -, 页码 55-58出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2018.04.058
关键词
Inorganic perovskite nanocrystals; Random laser; Plasmonic scattering; Two-photon pumping; Femtosecond pulses
资金
- National Natural Science Foundation of China [61575007]
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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