Considerations about Z-scan sensitivity improvement: theory versus experiments
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- Godin, T., Fromager, M., Päivänranta, B. et al. Appl. Phys. B (2009) 95: 579. doi:10.1007/s00340-009-3459-2
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This paper reports an experimental demonstration of the improvement of the Z-scan technique’s sensitivity. It is shown that this sensitivity can be multiplied by a factor equal to almost 400 with the help of simple binary diffractive elements. Such a possibility was actually predicted theoretically in one of our previous papers. In this study, the interpretation is investigated in a wider context taking into account the definition of the signal normalisation as introduced by Z-scan and the well-known eclipsing Z-scan (EZ-scan) experiments. In particular, advantages and drawbacks are compared, by looking at the normalised or the unnormalised aperture transmission.