Enhancement of harmonic generation by Fresnel-lensing effects |
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| Authors: | Cavalieri Stefano Fini Lorenzo Sali Emiliano Buffa Roberto |
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| Affiliation: | Dipartimento di Fisica and LENS, Universitá di Firenze, Via G. Sansone, Italy. |
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| Abstract: | We present experimental results of enhanced second- and third-harmonic generation efficiency from Fresnel-lensing effects. We obtained enhancement by a factor of 6 in the third-harmonic yield by simply limiting the laser beam with an iris. Higher enhancement factors (up to 16) were obtained with a Fresnel zone plate. The experimental findings are in good agreement with the results of a simple theoretical analysis. |
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