Influence of refractive index mismatch on data bit in two-photon three-dimensional data storage

ZHOU Yong-jun; TANG Huo-hong; HUANG Wen-hao; XIA An-dong

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Influence of refractive index mismatch on data bit in two-photon three-dimensional data storage

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- Influence of refractive index mismatch on data bit in two-photon three-dimensional data storage
- Optics and Precision Engineering Vol. 12, Issue 4, Pages: 432-437(2004)
- 作者机构：
  
  1. 中国科技大学, 精密机械及精密仪器系,安徽合肥,230026
  2. 中国科学院, 化学所分子反应动力学实验室, 北京, 100080
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN405
- Received：26 March 2004，
  
  Revised：22 June 2004，
  
  Published Online：15 August 2004，
  
  Published：15 August 2004
- 稿件说明：
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周拥军, 唐火红, 黄文浩, 夏安东. 折射率失配对双光子三维信息存储中信息点的影响[J]. 光学精密工程, 2004,(4): 432-437

ZHOU Yong-jun, TANG Huo-hong, HUANG Wen-hao, XIA An-dong. Influence of refractive index mismatch on data bit in two-photon three-dimensional data storage[J]. Editorial Office of Optics and Precision Engineering, 2004,(4): 432-437
周拥军, 唐火红, 黄文浩, 夏安东. 折射率失配对双光子三维信息存储中信息点的影响[J]. 光学精密工程, 2004,(4): 432-437 DOI：

ZHOU Yong-jun, TANG Huo-hong, HUANG Wen-hao, XIA An-dong. Influence of refractive index mismatch on data bit in two-photon three-dimensional data storage[J]. Editorial Office of Optics and Precision Engineering, 2004,(4): 432-437 DOI：

摘要

根据Torok的光在多层介质中传播的理论

模拟了在折射率失配情况下点扩展函数的强度分布.在介质折射率为1.48

多种物镜数值孔径

=0.25、0.45、0.65、0.85条件下

分析了信息点轴向尺寸及读出信号强度变化趋势.选取合适的光学参数(如物镜的数值孔径

=0.45

存储介质的折射率1.48)

能够使信息点在深度200μm内轴向尺寸变化率小于4%

信号读出强度变化率小于30%

提高了存储效果.对选取各种物镜和介质折射率的情况下信息点的变化趋势分析表明

折射率失配使信息点横向尺寸随深度变化不大

而轴向尺寸及信号读出强度产生较大的变化

变化的程度与物镜

、介质的折射率及存储深度密切相关.采用与模拟时相同的光学参数

在光致变色材料中进行了双光子三维存储实验.通过观察信息点的轴向及横向扫描图像和信号的读出强度

证实了这种变化趋势.实验结果为双光子三维存储提供了参考依据.

Abstract

Based on Torok's theory

the profile of IPSF was simulated under the condition of refractive index mismatch. Under the condition of refractive index 1.48 and several kinds of objective lens such as

=0.25

0.45

0.65

0.85

the variation trends of the axial bit size and readout signal intensity were analyzed. Selecting appropriate optical parameter(such as

=0.45

refractive index 1.48)

at the depth of less than 200 μm

the variation of the axial bit size is less than 10%

the max variation of readout signal intensity is less than 30%

so the effect of recording is improved. By analyzing the variation trends of data bit under the condition of several kinds of

and refractive index

it indicates that refractive index mismatch makes lateral bit size little change but axial bit size and readout signal intensity greater change. The change degree is closely related with

refractive index and recording depth. Adopting the same optical parameter with simulating

three-dimensional data was recorded in photochromic material by two-photon excitation. By observing the scanning image of data bit in axial and lateral direction and readout signal intensity

this variation trend was testified.

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Keywords

references

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