Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (6): 1543-1548.doi: 10.3866/PKU.WHXB201603142

• ARTICLE • Previous Articles    

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

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