圆偏振飞秒激光制备铁表面结构及色彩分析

苏亚辉; 韩小虎; 范珍珠; 张华永; 钟红梅

doi:10.3788/OPE.20152313.0052

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圆偏振飞秒激光制备铁表面结构及色彩分析

更新时间：2020-08-13

- 圆偏振飞秒激光制备铁表面结构及色彩分析
- Color analysis of iron surface structure fabricated by circularly polarized femtosecond laser
- 光学精密工程 2015年23卷第10z期页码：52-56
- 作者机构：
  
  1. 安徽大学电气工程与自动化学院,安徽合肥,中国,230601
  2. 安徽大学计算智能与信号处理教育部重点实验室,安徽合肥,230039
  3. 安徽大学电子信息工程学院,安徽合肥,230601
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(No.51275502)();安徽省自然科学基金资助项目(No.1308085ME76)()
- DOI：10.3788/OPE.20152313.0052
  中图分类号： O433.4;TG156.99
- 收稿日期：2015-05-20，
  
  修回日期：2015-06-18，
  
  纸质出版日期：2015-11-14
- 稿件说明：
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苏亚辉, 韩小虎, 范珍珠等. 圆偏振飞秒激光制备铁表面结构及色彩分析[J]. 光学精密工程, 2015,23(10z): 52-56

SU Ya-hui, HAN Xiao-hu, FAN Zhen-zhu etc. Color analysis of iron surface structure fabricated by circularly polarized femtosecond laser[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 52-56
苏亚辉, 韩小虎, 范珍珠等. 圆偏振飞秒激光制备铁表面结构及色彩分析[J]. 光学精密工程, 2015,23(10z): 52-56 DOI： 10.3788/OPE.20152313.0052.

SU Ya-hui, HAN Xiao-hu, FAN Zhen-zhu etc. Color analysis of iron surface structure fabricated by circularly polarized femtosecond laser[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 52-56 DOI： 10.3788/OPE.20152313.0052.

摘要

提出了一种由圆偏振飞秒激光(CPFL)诱导铁表面生成多彩色的方法。首先

采用CPFL扫描铁表面以形成亚波长彩色波纹且表面随机分布着直径为50~190 nm的纳米颗粒。然后

用白光照射激光处理后的铁表面研究表面色彩与入射角之间的关系。结果显示

当入射角逐渐从0°变化至80°时

该表面的色彩也发生相应变化。为了揭示上述观测实验的机理

用时域有限差分(FDTD)方法建立了球形纳米粒子随机分布在铁表面的亚波长波纹的模型。实验显示:增大白光的入射角

铁表面反射光谱会从蓝色向红色偏移

与观测实验结果相一致。此外

随着纳米颗粒尺寸的减小

反射光谱有蓝移的趋势且峰值增加。该成果在信息存储、验证码和防伪图案等应用领域有潜在应用价值。

Abstract

A method to induce multi-colors on an iron surface by using Circularly Polarized Femtosecond Laser (CPFL) processing was proposed. The subwavelength ripples were fabricated by CPFL scanning over the iron surface where covered by randomly distributed nanoparticles with diameters from 50 nm to 190 nm. A while light was used to irradiate the treated iron surface

and the relation between surface colors and incident angles was explored. By changing the incident angles of a white light from 0° to 80°

diverse colors were displayed on the laser-treated iron surface. In order to understand the underlying mechanism of the experimental results

a model of spherical nanoparticles spread randomly on ripples of the iron surface was built by Finite-difference Time Domain (FDTD). The experiments show that the surface reflection spectrum is varied from blue to red by increasing the incident angle of white light

which is consistent with the experimental results. Furthermore

it is found that the reflection spectrum shifts towards blue and the peak increases by decreasing the sizes of nanoparticles. This work may find potential applications in the fields of information storage

identifying codes and anti-counterfeiting patterns.

关键词

Keywords

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