Z-scan sensitivity enhancement using a binary diffractive optics |
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Authors: | R. de Saint Denis M. Fromager E. Cagniot K. Ait-Ameur |
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Affiliation: | (1) Centre Interdisciplinaire de Recherche Ions Lasers, UMR6637, CEA-CNRS-ENSICAEN et Université de Caen, CIRIL-ENSICAEN 6, Boulevard Maréchal Juin, 14050 Caen Cedex, France |
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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. PACS 42.25.Fx |
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