The design of modern photonic and light-wave devices is often guided by wideband finite-difference time-domain (FDTD) simulation through which one can easily explore the desired broadband response in a single run. In most of these studies, one often encountered problem is how to efficiently simulate a super-thin material sheet as many photonic components contain coating layers with thickness ranging from sub-millimeter to several micrometers. The traditional meshing technique, when applied to directly discretize these material sheets, will result in a very data-intensive computational process. The situation gets even worse when the thin layer yet to be modeled is highly dispersive, for which extra consumption of memory is usually required to store and compute the dispersion features of the thin sheet.
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