EMUstack: an open source route to insightful electromagnetic computation via the Bloch mode scattering matrix method

We describe EMUstack, an open-source implementation of the Scattering Matrix Method (SMM) for solving field problems in layered media. The fields inside nanostructured layers are described in terms of Bloch modes that are found using the Finite Element Method (FEM). Direct access to these modes allows the physical intuition of thin film optics to be extended to complex structures. The combination of the SMM and the FEM makes EMUstack ideally suited for studying lossy, high-index contrast structures, which challenge conventional SMMs.

本描述了EMUstack，其为分层介质中求解场问题的散射矩阵法（SMM）的开源实现。纳米结构层内的场以通过有限元法（FEM）发现的布洛赫模式进行描述。对这些模式的直接访问扩展了薄膜光学物理直觉至复杂结构。SMM与FEM的结合使EMUstack对于研究损耗性、高折射率对比度结构尤为适宜，这些结构对传统SMM构成了挑战。