14 September 2006 Monte Carlo simulation of two-photon induced molecular orientation in solid polymer films
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Abstract
We present the first Monte Carlo simulations of the mechanism of two-photon induced molecular orientation by photo-isomerization of chromophores in solid polymer films. Two-photon absorption (TPA) occurring at intense laser pulses creates molecular orientation of photo-isomers proportionally to the square of the excitation intensity and the fourth power of the cosine of the angle θ between the TPA-transition dipole moment and the direction of the polarization of the excitation light. Photo-selection in cos4θ will result in the orientational redistribution of the chromophores differently from the well-known one-photon absorption process. Kinetic Monte Carlo model is proposed and illustrative "microscopic" results related to diffraction gratings inscription are presented.
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Grzegorz Pawlik, Antoni C. Mitus, Francois Kajzar, "Monte Carlo simulation of two-photon induced molecular orientation in solid polymer films", Proc. SPIE 6330, Nonlinear Optical Transmission and Multiphoton Processes in Organics IV, 633003 (14 September 2006); doi: 10.1117/12.683863; https://doi.org/10.1117/12.683863
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