Large irradiance limiting induced by three-photon absorption of a symmetrical fluorene-based molecule.
Herein, three-photon absorption (3PA) effect of a symmetrical fluorene-based molecule, pumped with 38 ps Q-switched 1064 nm laser pulses, is reported. An accurate Gaussian fitting method is used to obtain the three-photon absorption cross-section. The obtained three-photon absorption cross-section, 8.54 x 10(-76) cm(6) s(2), is very high. The irradiance limiting nonlinear transmittance is as low as 2% when the incident irradiance is 120 GW/cm(2). The geometry and electronic transition of the molecule are systematically studied by AM1 and TD SCF/DFT methods.
Liu
Junhui
J
Institute of Microsystem Physics, School of Physics and Electronics, Henan University, Kaifeng, Henan 475004, P.R.China. junhuiliu@126.com
Mao
Yanli
Y
Gu
Yuzong
Y
Huang
Mingju
M
Zhang
Weifeng
W
Guo
Lijun
L
Ma
Wenbo
W
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005449:Fluorenes / Q000737:chemistry*; D007834:Lasers; D008029:Lighting / Q000379:methods*; D036641:Microscopy, Fluorescence, Multiphoton / Q000379:methods*; D008956:Models, Chemical
D005449:Fluorenes; C041509:fluorene