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Scheme of physical events for laser induced two-dimensional Marangoni effect and photonic whirl formation. (a) Gaussian laser beam at (xc, yc) incident normal to the absorbing liquid layer induces the gradient of temperature at the interface and starts the self-amplified Marangoni flows; (b) interface bending increases and when it reaches the laser spot position a stable whirl of fluid pinned-up to the laser spot is formed.
