物理化学学报 >> 2016, Vol. 32 >> Issue (6): 1543-1548.doi: 10.3866/PKU.WHXB201603142

论文 上一篇    

末端基团对芴类衍生物分子非线性光学性质的影响

赵丽云1,张玉瑾2,马红2,*(),冷建材1,*()   

  1. 1 齐鲁工业大学理学院,济南250353
    2 山东师范大学物理与电子科学学院,济南250014
  • 收稿日期:2015-12-14 发布日期:2016-06-03
  • 通讯作者: 马红,冷建材 E-mail:mahong@sdnu.edu.cn;jiancaileng@qlu.edu.cn
  • 基金资助:
    国家自然科学基金(11247307, 11304172, 11304186);山东省重点研发计划(2015GGX101017);齐鲁工业大学学科分类型建设经费;山东师范大学优秀青年骨干教师国际合作培养计划和山东省高等学校优秀中青年骨干教师国际合作培养计划资助项目

Influence of Terminal Group on Nonlinear Optical Properties of Fluorene Derivatives

Li-Yun ZHAO1,Yu-Jin ZHANG2,Hong MA2,*(),Jian-Cai LENG1,*()   

  1. 1 School of Science, Qilu University of Technology, Jinan 250353, P. R. China
    2 School of Physics and Electronics, Shandong Normal University, Jinan 250014, P. R. China
  • Received:2015-12-14 Published:2016-06-03
  • Contact: Hong MA,Jian-Cai LENG E-mail:mahong@sdnu.edu.cn;jiancaileng@qlu.edu.cn
  • Supported by:
    The project was supported by the National Natural Science Foundation of China(11247307, 11304172, 11304186);Shandong Province Key Research Development Program, China(2015GGX101017);Qilu University of Technology Subject Construction Funds, China;Excellent Young Scholars Research Fund of Shandong Normal University, China, and International Cooperation Training Program for Young and Middle School Teachers in Shandong Province, China

摘要:

通过采用预估矫正的时域有限差分方法数值求解速率方程-光场强度方程,研究了纳秒激光脉冲在具有不同末端基团的对称性芴类衍生物分子2,7-双(4′-(二甲基氨基)苯乙烯基)-9-氢-芴(F1分子)和2,7-双(4′-硝基苯乙烯基)-9-氢-芴(F2分子)中的动力学传播过程以及光限幅效应,分析了两种分子的光限幅特性随传播距离(z)、粒子数密度(N)以及脉冲宽度(τ)的变化情况,并且拟合了两种分子的动态双光子吸收(TPA)截面。计算结果表明,该系列分子具有较大的双光子吸收截面以及较好的光限幅效应。此外,F2分子的末端基团―NO2与F1分子的末端基团―N(CH3)2相比具有更强的得电子能力,因而使得F2分子具有更大的跃迁偶极矩,双光子吸收截面增大,光限幅效应更为明显。

关键词: 光限幅效应, 双光子吸收, 速率方程-光场强度方程, 芴类衍生物分子

Abstract:

The nanosecond-scale propagations and optical-limiting properties of two fluorene derivatives-2, 7-bis(4′-(dimethylamino)-distyryl)-9H-fluorene (F1) and 2,7-bis(4′-(nitro)-distyryl)-9H-fluorene (F2) with different terminal groups are investigated by solving the coupled rate equations and field intensity equation using an iterative predictor-corrector finite-difference time-domain technique. The influence of the propagation distance (z), particle number density (N), and pulse width (τ) on the optical-limiting properties and two-photon absorption (TPA) of these molecules is analyzed. The calculations show that both F1 and F2 possess large two-photon absorption cross sections and pronounced optical-limiting properties. In addition, the nonlinear optical properties depend crucially on the terminal groups. F2, with terminal groups of ―NO2, has much larger dipole moments, an enhanced two-photon absorption cross section, and superior optical-limiting ability compared with F1, which have terminal groups of ―N(CH3)2.

Key words: Optical limiting, Two-photon absorption, Rate equation-field intensity equation, Fluorene derivative molecule

MSC2000: 

  • O644