21 February 2011 Broadband third-harmonic generation on interfaces using femtosecond pulses
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We report on third-harmonic generation (THG) in optical materials using femtosecond pulses and Z-scan method. Here we have played with beam focusing parameters and, in this way, we could track the THG signal at function of Rayleigh ranges. We observed that the femtosecond pulse has broadband spectrum and such property also affects the thirdharmonic (TH) spectrum. In this experiment we were able to distinguish the contribution of bulk and interface on the THG by measuring the intensity and spectral profile of the TH signal.
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E. C. Barbano, E. C. Barbano, J. P. Siqueira, J. P. Siqueira, C. R. Mendonça, C. R. Mendonça, L. Misoguti, L. Misoguti, S. C. Zilio, S. C. Zilio, "Broadband third-harmonic generation on interfaces using femtosecond pulses", Proc. SPIE 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X, 79170T (21 February 2011); doi: 10.1117/12.874790; https://doi.org/10.1117/12.874790

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