Interaction of Light with Subwavelength Structures
When a light field interacts with structures that have
complex geometric features comparable in size to the
wavelength of the light, it is not permissible to invoke the
assumptions of the classical diffraction theory, which simplify
the problem and allow for approximate solutions. For such
cases, direct numerical solutions of the governing equations are
sought through approximating the continuous time and space
derivatives by the appropriate difference operators.
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