Competition in Nonlinear Optical Properties of Cu-doped ZnO Nanorods

DAI Jun; CHEN Jing-dong; HE Ying-ji; CHEN Yong-zhu

doi:10.3788/fgxb20173807.0855

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Competition in Nonlinear Optical Properties of Cu-doped ZnO Nanorods

更新时间：2020-08-12

- Competition in Nonlinear Optical Properties of Cu-doped ZnO Nanorods
- Chinese Journal of Luminescence Vol. 38, Issue 7, Pages: 855-861(2017)
- 作者机构：
  
  1. 闽南师范大学物理与信息工程学院,福建漳州,363000
  2. 广东技术师范学院光电工程学院,广东广州,510665
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China (61475038,11174061,6167500
- DOI：10.3788/fgxb20173807.0855
  CLC： O472.3;O482.31
- Received：30 December 2016，
  
  Revised：14 February 2017，
  
  Published：05 July 2017
- 稿件说明：
移动端阅览
戴军, 陈景东, 何影记等. 铜掺杂氧化锌纳米棒的非线性光学响应竞争特性[J]. 发光学报, 2017,38(7): 855-861

DAI Jun, CHEN Jing-dong, HE Ying-ji etc. Competition in Nonlinear Optical Properties of Cu-doped ZnO Nanorods[J]. Chinese Journal of Luminescence, 2017,38(7): 855-861
戴军, 陈景东, 何影记等. 铜掺杂氧化锌纳米棒的非线性光学响应竞争特性[J]. 发光学报, 2017,38(7): 855-861 DOI： 10.3788/fgxb20173807.0855.

DAI Jun, CHEN Jing-dong, HE Ying-ji etc. Competition in Nonlinear Optical Properties of Cu-doped ZnO Nanorods[J]. Chinese Journal of Luminescence, 2017,38(7): 855-861 DOI： 10.3788/fgxb20173807.0855.

摘要

利用飞秒脉冲激光激发Cu掺杂ZnO纳米棒，研究其特有的非线性光学性质和激发机制。在激发波长为750 nm的荧光光谱中，二次谐波峰非常弱，几乎可以忽略，存在非常强的激子发光峰和Cu掺杂导致缺陷发光峰。激发强度的增大会导致这两个发光峰强度呈非线性增大，激子发光峰位产生明显红移，而缺陷发光峰位没有变化。进一步增大激发强度，缺陷发光峰强度会出现饱和甚至有所下降，而激子发光峰强度持续增大。当激发波长增加到760 nm时，从样品的荧光光谱可以清楚地识别到二次谐波峰和激子发光峰以及缺陷发光峰并存。随着激发波长的进一步增加，二次谐波强度不断增大，而激子发光峰和缺陷发光峰的强度却随之下降。当激发波长为790 nm和800 nm时，未发现激子发光峰和缺陷发光峰，非线性光谱以二次谐波为主导。研究结果表明，通过选择合适的激发波长和激发强度，可以实现发光颜色的转变，使得Cu掺杂ZnO纳米棒在全光显示方面具有潜在的发展前景。

Abstract

In order to study the unique nonlinear optical properties and excitation mechanism

Cu-doped zinc oxide nanorods were excited by femtosecond pulsed laser. Under the excitation of 750 nm

the second harmonic peak is almost ignore meanwhile only the exciton peak and Cu doping related peak. The increase of the excitation intensity leads to a nonlinear increase of the intensity of the two emission peaks. The position of exciton peak exhibits a red shift meanwhile the position of defect peak does not move. If the excitation intensity further increases

the intensity of the defect related emission will decrease and the intensity of the exciton emission will increase continuously. When the excitation wavelength increases to 760 nm

the fluorescence spectrum of the sample can be clearly recognized the coexistence of the second harmonic peak and the exciton emission as well as the defect related emission. With the increasing of the excitation wavelength

the intensity of the second harmonic increases and the intensity of exciton emission and defect related emission decrease. At the excitation wavelengths of 790 nm and 800 nm

the exciton emission and defect related emission cannot be found

and the nonlinear spectrum is dominated by second harmonic generation. By selecting the appropriate excitation wavelength and excitation intensity

the transition of the luminescent color display can be realized

which makes Cu-doped ZnO nanorods as the potential of all-optical display.

关键词

Keywords

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