4. ConclusionBy using CIP method, n

4. Conclusion
By using CIP method, numerical analysis of scattered electromagnetic field by a dielectric
cylinder was demonstrated. Referring to result of analytical approximated approach, result
of CIP method showed good accuracy in comparison with result by conventional FDTD
method. As examples of designing of photonic crystal structure with high-contrast materia profile, Y-shaped branch waveguide and Mach-Zehnder interferometer in photonic crystal
structure with triangular lattice were numerically demonstrated. The CIP method showed
reasonable results of branch circuit and the filtering characteristics by using cavity. Also
for Mach-Zehnder interferometer, numerical results of electric field profile by CIP method
implemented experimental result of the structure for typical frequencies.
For example, designing of filtering device for microwave communication or guiding device
for optical fiber communication system, the CIP method is expected to show superior
performance in accuracy compared with conventional FDTD method. Application of CIP
method to design electromagnetic or optical signal processing devices with some defects in
periodic structure can be designed by CIP method