Infrared femtosecond laser-induced great enhancement of ultraviolet luminescence of ZnO two-dimensional nanostructures
Infrared femtosecond laser-induced great enhancement of ultraviolet luminescence of ZnO two-dimensional nanostructures
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红外飞秒激光诱导ZnO二维纳米结构紫外发光大幅增强
DOI：
10.1007/s00339-014-8651-5
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发表时间：
2014
影响因子：
2.7
通讯作者：
Qiu Jianrong
中科院分区：
文献类型：
--
作者：
Pan Jia;Jia Tianqing;Jia Xin;Feng Donghai;Zhang Shian;Sun Zhenrong;Qiu Jianrong
利用3束800 nm的飞秒激光干涉，在氧化锌晶体表面制备了二维复合纳米结构。这种2D纳米结构在中心波长1200~2000 nm的红外飞秒激光激发下表现出很大的紫外光增强作用。我们认为，800 nm激光烧蚀产生的二维纳米结构禁带中的缺陷态导致了紫外光发射的显著增强。我们进行了理论计算，并用实验结果很好地解释了这一点。
Two-dimensional (2D) complex nanostructures on the surface of ZnO crystal are fabricated by the interference of three 800 nm fs laser beams. The 2D nanostructures exhibit a great enhancement of UV emission excited by infrared fs laser with central wavelengths ranging from 1,200 nm to 2,000 nm. We propose that the defect states in the band gap of 2D nanostructures induced by 800 nm fs laser ablation cause the great enhancement of UV emission. We make theoretical calculations and explain well with the experimental results.