Abstract
We report a theoretical study of the sensitivity enhancement of Z-scan technique, using a simple binary diffractive optical element. The latter is a phase aperture made from a transparent plate that has a circular relief introducing a π phase shift in the central region of the incident beam. We demonstrate that the phase aperture acts like a divergence multiplier allowing the Z-scan sensitivity to be increased by a factor of several hundred.
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42.25.Fx
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de Saint Denis, R., Fromager, M., Cagniot, E. et al. Z-scan sensitivity enhancement using a binary diffractive optics. Appl. Phys. B 90, 513–517 (2008). https://doi.org/10.1007/s00340-007-2887-0
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DOI: https://doi.org/10.1007/s00340-007-2887-0