How do I integrate the Poynting vector at a specific surface?

Date	Category
2023-12-19 17:41:09	Monitors

Since the field data in Tidy3D are natively xarray.DataArray objects, the most convenient way to perform integration is by using the integrate method in xarray. For example, if we want to integrate the Poynting vector on a surface parallel to the xy plane, one needs to compute the z-component of the time-averaged Poynting vector \(Sz\) and then

flux = Sz.integrate(coord=["x", "y"])

This effectively achieves the same as putting a FluxMonitor object at the same plane and extracting the flux result from the monitor data.