Ring-Airy beams at the wavelength limit.
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We demonstrate that paraxial ring-Airy beams can approach the wavelength limit, while observing a counterintuitive, strong enhancement of their focal peak intensity. Using numerical simulations, we show that this behavior is a result of the coherent constructive action of paraxial and nonparaxial energy flow. A simple theoretical model enables us to predict the parameter range over which this is possible.
author list (cited authors)
Manousidaki, M., Fedorov, V. Y., Papazoglou, D. G., Farsari, M., & Tzortzakis, S.