engleski

Generation of Ribbons, Helicoids and Complex Scherk Surface in Laser-Matter Interactions

Motivated by a diversity of the shape instability phenomena in condensed matter physics, we study formation of elastic ribbon structures and trans-formation into helicoidal structures. Using the multi-pulse laser-matter interaction with the Co-coated surface, a one-dimensional high-density vortex filament array has been created. Increasing the number of pulses, the oscillatory strain field causes the cascade of the shape transformations into structures of increasing topological complexity:vortex filaments into ribbons, into ribbon-helicoids and tubular-ribbon-helicoids, and then into short ribbon-structures with the complex Scherk surface being identified. Above a critical number of pulses, the system is catastrophically disintegrated into small-scale wrinkled and crumpled surfaces.

Flow Instability; Micro- and Nano- Scale Flow Phenomena; Flow vizualization

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