Patching Conditions of Multi-domain Pseudospectral Time-domain Method

The paper proposes a uniform representation for patching conditions using characteristic variables (CVs) to effectively treat distinct types of interfaces in multidomain pseudospectral time domain (MPSTD) algorithm. Instead of direct use of physical boundary conditions, it is more accurate and stable to match boundary conditions at the interfaces separating two subdomains of different materials. The good performance of the scheme is demonstrated by numerical examples.