Stationary phase approximation applied to symmetric Airy beams yields conditions for identifying constructive/destructive interference and phase singularities, confirmed numerically in paraxial (order-3 roots) and nonparaxial (order-6 roots) cases.
Topology of optical vortex lines formed by the inter- ference of three, four, and five plane waves
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Morphological properties of 2D symmetric Airy beams extracted from the stationary wave approximation
Stationary phase approximation applied to symmetric Airy beams yields conditions for identifying constructive/destructive interference and phase singularities, confirmed numerically in paraxial (order-3 roots) and nonparaxial (order-6 roots) cases.