Self-collimation and superlensing in wavy-structured two-dimensional photonic crystals

Wavy-structured two-dimensional (2D) photonic crystal (PC) is possessed of isofrequency contours of rectangular form and is therefore capable of self-collimation. The self-guiding phenomenon is studied by calculating the intensity of the electromagnetic waves through slabs of the PC. Superlensing based on self-collimation of wavy-structured 2DPC is also investigated by analyzing the field pattern where point source is used. The full width at half maximum of image point is calculated to be 0.28 lambda. The position of the image is always located in the near-field domain of the slab. Image quality degrades gradually as the slab thickness or the source-slab distance increases.