Nowadays, it has become an essential task to characterize the nonlinear optical response of new materials, in
order to identify suitable candidates for ultrafast processing in all-optical devices. One of the most widely-used
techniques for this purpose is the Z-scan, which consists on measuring the nonlinear refractive and absorptive responses
of a material by scanning the sample along the optical path of a convergent Gaussian beam. We will analyze the
nonlinear response of carbon disulfide and new organic composites. In our setup, using a high-repetition rate
femtosecond laser, we have included an optical chopper for managing thermal effects in order to characterize electronic
nonlinearities.
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