Modulation on Optical Limiting and Two-Photon Absorption Behavior of a Molecular Medium by Two-Color Ultrashort Laser Pulses
Year: 2014
Author: Yu-Jin Zhang, Yu-Zhi Song, Chuan-Kui Wang
Journal of Atomic and Molecular Sciences, Vol. 5 (2014), Iss. 2 : pp. 163–170
Abstract
The dynamical behavior of two-color ultrashort laser pulse propagating in a molecular medium 4,4'-bis(di-n-butylamino)stilbene (BDBAS) has been studied by employing an iterative predictor-corrector finite-difference time domain (FDTD) technique to solve the Maxwell-Bloch equations. The results indicate that the spectrum of electric field shows oscillation feature around the two-photon resonant frequency when the delay time exists due to the interaction between two sub-pulses. The optical limiting window turns narrower and the saturation value of output intensity gets larger with the presence of delay time compared with no delay time case. The dynamical TPA cross section is smaller with the increase of delay time. The studies suggest a method to modulate the nonlinear optical properties of the medium by controlling the delay time of the two-color pulse.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/jams.100313.010414a
Journal of Atomic and Molecular Sciences, Vol. 5 (2014), Iss. 2 : pp. 163–170
Published online: 2014-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 8
Keywords: optical limiting two-photon absorption Maxwell-Bloch equations two-color pulse.