Recent content by sph711

Thank you for your reply. However, the link you provide did not work for me I did some more research today, and I think I found what I was looking for. I came across the Neumanns principle which states "The symmetry of any physical property of a crystal must include the symmetry elements of the...

Hello everybody, electrical engineer, currently doing my PhD at TU Delft, working on some fundamentals of peridodic structures as well as applications to graded index devices together with additive manufacturing. Looking forward to some interessting discussions.

Hi all, (first post here :D) I am working on periodic dielectric structures in the long-wavelength limit (wavelength much larger than the periodicity). In the long wavelength limit the periodic strucutre can be homogonized and described via an effective permittivity (or refractive index)...