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arXiv 1601.00560physics.optics
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基于变换光学设计的色散隐形结构的时域分析

Analysis in temporal regime of dispersive invisible structures designed from transformation optics

B. Gralak, G. Arismendi, B. Avril, A. Diatta, S. Guenneau

摘要:

对由两个各向异性均匀层构成的简单隐形结构进行了时域理论分析。引入频散,推导了结构在因果激励下大时间瞬态场的解析表达式。该表达式表明,限幅原理适用于以时间的-3/4次方衰减的瞬态场。斗篷的质量在短时间内降低,并在很长时间内保持不变。一维的理论分析补充了全波数值模拟在二维的情况下,证实了色散的影响。

英文摘要:

A simple invisible structure made of two anisotropic homogeneous layers is analyzed theoretically in temporal regime. The frequency dispersion is introduced and analytic expression of the transient part of the field is derived for large times when the structure is illuminated by a causal excitation. This expression shows that the limiting amplitude principle applies with transient fields decaying as the power -3/4 of the time. The quality of the cloak is then reduced at short times and remains preserved at large times. The one-dimensional theoretical analysis is supplemented with full-wave numerical simulations in two-dimensional situations which confirm the effect of dispersion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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