23 July 1993 Measurement of chi(3)(-omega3;omega1,omega1,-omega2) spectra for poly[3-tetradecylthiophene]
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Proceedings Volume 1852, Nonlinear Optical Properties of Advanced Materials; (1993) https://doi.org/10.1117/12.148460
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
We demonstrate that the Maker fringe technique can be applied to third order frequency mixing experiments designed to measure the electronic (chi) (3)(-(omega) 3;(omega) 1,(omega) 1,-(omega) 2) dispersion with (omega) 1 for a poly[3-tetradecylthiophene] thin film. Both the magnitude and the phase of the (chi) (3) were obtained. In the magnitude spectrum there was a strong three-photon resonance where the output frequency ((omega) 3equals2(omega) 1-(omega) 2) corresponds to the energy level of the first one photon state. We also found a peak which could be either a 2(omega) 1 or a (Delta) (omega) (equals(omega) 1-(omega) 2) resonance. Since this method is considered to be more sensitive to two-photon resonances that third harmonic generation, it can be used as a powerful tool to probe two photon states in the case of thin film polymer samples.
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Myoungsik Cha, Myoungsik Cha, William Eugene Torruellas, William Eugene Torruellas, Dieter Neher, Dieter Neher, George I. Stegeman, George I. Stegeman, Mario Leclerc, Mario Leclerc, } "Measurement of chi(3)(-omega3;omega1,omega1,-omega2) spectra for poly[3-tetradecylthiophene]", Proc. SPIE 1852, Nonlinear Optical Properties of Advanced Materials, (23 July 1993); doi: 10.1117/12.148460; https://doi.org/10.1117/12.148460
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