Ring-Airy beams at the wavelength limit

Opt Lett. 2018 Mar 1;43(5):1063-1066. doi: 10.1364/OL.43.001063.

Abstract

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.

MeSH terms

  • Computer Simulation
  • Light
  • Models, Theoretical*
  • Physical Phenomena
  • Refractometry / methods*
  • Scattering, Radiation*