Generation of ribbons, helicoids, and complex Scherk surfaces in laser-matter interactions.
Generation of ribbons, helicoids, and complex Scherk surfaces in laser-matter interactions.
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DOI：
10.1103/physreve.81.036311
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发表时间：
2009-07
期刊：
影响因子：
--
通讯作者：
S. Lugomer;Y. Fukumoto
中科院分区：
文献类型：
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作者：
S. Lugomer;Y. Fukumoto
受凝聚态物理中形状不稳定现象的多样性的启发，我们研究了弹性带状结构的形成和向螺旋结构的转变。利用多脉冲激光与镀钴表面物质相互作用，产生了一维高密度涡丝阵列。增加脉冲的数量，振荡的应变场导致级联的形状转换成结构的拓扑结构的复杂性增加：涡丝成带状，带状螺旋体和管状带状螺旋体，然后到短带状结构与复杂的Scherk表面被确定。变换的级联遵循新结构的拓扑复杂性随着脉冲的数量而增加的情况，从而实现具有更有效的能量弛豫的配置。超过临界脉冲数，系统会灾难性地分解成小规模的褶皱和起皱的表面。我们表明，带状转变的临界参数是激光脉冲的数量，这是相当于一些临界振荡频率。
Motivated by a diversity of the shape instability phenomena in condensed-matter physics, we study the formation of elastic ribbon structures and transformation into helicoidal structures. Using the multipulse 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. The cascade of transformations follows the scenario in which the topological complexity of the new structure increases with the number of pulses, thus, realizing configurations with more efficient energy relaxation. Above a critical number of pulses, the system is catastrophically disintegrated into small-scale wrinkled and crumpled surfaces. We show that the critical parameter for the ribbon transformations is the number of laser pulses which is equivalent to some critical oscillatory frequency.