ABSTRACT
Finite-difference time-domain (FDTD) method is known as a popular way to perform computational electrodynamics. This method was
originally devised to analyze electromagnetic field distribution
around an antenna. Recently, its outstanding usefulness has mani-
fested itself with the development of nanotechnology, because near
and far electromagnetic fields resulting from the interaction of light
with complicated microstructure are easily simulated, which are
often difficult to obtain in actual measurements. Although a lot of
excellent papers and books describing its principle, algorithm and
applications have been published so far, herewewill briefly describe
its principle of calculation for the reader’s convenience. For this
purpose, we will follow an excellent book written by Uno, where
the comprehensive description of the FDTD method is given [Uno
(1998)].
