Fine tunable red-green upconversion luminescence from glass ceramic containing 5%Er3+:NaYF4 nanocrystals under excitation of two near infrared femtosecond lasers
Fine tunable red-green upconversion luminescence from glass ceramic containing 5%Er3+:NaYF4 nanocrystals under excitation of two near infrared femtosecond lasers
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DOI：
10.1063/1.4892594
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发表时间：
2014-08
影响因子：
3.2
通讯作者：
Xiaoying Shang;Pin Chen;Wenjing Cheng;K. Zhou;Jing Ma;D. Feng;Shian Zhang;Zhenrong Sun;J. Qiu-J.
中科院分区：
文献类型：
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作者：
Xiaoying Shang;Pin Chen;Wenjing Cheng;K. Zhou;Jing Ma;D. Feng;Shian Zhang;Zhenrong Sun;J. Qiu-J.
在本文中，我们报道了由两个近红外飞秒激光器同时激发的含有 5%Er3+:NaYF4 纳米晶体的玻璃陶瓷的精细可调谐红绿上转换发光。当玻璃陶瓷受到800 nm飞秒激光照射时，检测到以670 nm为中心的微弱红光发射。当飞秒激光波长调谐至 1490 nm 时，观察到明亮的红光。然而，当同时受到两个飞秒激光激发时，样品发出以 550 nm 为中心的明亮绿光，而红光保持相同的强度。红光和绿光强度对两个泵浦激光器的依赖性有很大不同，这使得我们能够通过分别调节两个泵浦激光器的强度来控制颜色发射。我们提出了 Er3+ 离子与两个飞秒激光场相互作用的理论模型，并很好地解释了实验结果。
In this paper, we report fine tunable red-green upconversion luminescence of glass ceramic containing 5%Er3+: NaYF4 nanocrystals excited simultaneously by two near infrared femtosecond lasers. When the glass ceramic was irradiated by 800 nm femtosecond laser, weak red emission centered at 670 nm was detected. Bright red light was observed when the fs laser wavelength was tuned to 1490 nm. However, when excited by the two fs lasers simultaneously, the sample emitted bright green light centered at 550 nm, while the red light kept the same intensity. The dependences of the red and the green light intensities on the two pump lasers are much different, which enables us to manipulate the color emission by adjusting the two pump laser intensities, respectively. We present a theoretical model of Er3+ ions interacting with two fs laser fields, and explain well the experimental results.