Patent ID: 8706455
Filing Date: 2014-04-22
Classification: G01N,G03F

Abstract:
1. A method of calculating electromagnetic scattering properties of a structure, the structure including materials of differing properties such as to cause a discontinuity in an electromagnetic field at a material boundary, the method comprising: generating, using a processing device, a localized normal-vector field in a region of the structure defined with reference to the material boundary; constructing, using the processing device, a vector field that is continuous at the material boundary by using the normal-vector field to select continuous components of the electromagnetic field tangential to the material boundary and to select continuous components of a corresponding electromagnetic flux density normal to the material boundary; performing, using the processing device, a localized integration of the normal-vector field over the region to determine coefficients of a field-material interaction operator; numerically determining, using the processing device, a component of the electromagnetic field by using the field-material interaction operator to operate on the vector field; and calculating, using the processing device, electromagnetic scattering properties of the structure using the determined component of the electromagnetic field.