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Welcome! This is the documentation for nannos v 2.6.3, last updated on Feb 28, 2025.

nannos is a Python package that solves Maxwell’s equations in bi-periodic multilayer stacks using the Fourier Modal Method (FMM).

Sketch of a multilayer grating

The code of the project is on Gitlab

Features#

Computation of transmitted and reflected efficiencies for the various diffraction orders.
Calculation of the electromagnetic field in the structure.
Various FMM formulations.
Automatic differentiation enabling inverse design of metasurfaces.
GPU acceleration.