Author/Authors :
Rafiee Dastjerdi، Somayeh نويسنده Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Evin 1983969411, Tehran, Iran , , Ghanaatshoar، Majid نويسنده Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Evin 1983969411, Tehran, Iran , , Delfanazari، Kaveh نويسنده Optoelectronic Research Centre, University of Southampton, SO17 1BJ, Southampton, UK ,
Abstract :
We study the focusing properties of a two dimensional complex square-lattice photonic crystal (PC) comprising air holes immersed in Ge medium. The finite difference time domain (FDTD) method is utilized to calculate the dispersion band diagram and to simulate the image formation incorporating the perfectly matched layer (PML) boundary condition. In contrast to the common square PCs with the same air filling factor, the frequency corresponding to the effective negative refraction occurs in the second photonic band and the spatial image resolution is improved.
