  Based on the exact numerical simulation and physical analysis, we have
demonstrated all-angle single-beam left-handed behavior and superlens for both
transverse electric and transverse magnetic modes in a twodimensional coated
photonic crystal. The imaging behaviors by two-dimensional
photonic-crystal-based superlens have been investigated systematically.
Good-quality images and focusing, with relative refractive index of &#8722;1,
have been observed in these systems for both polarized waves. In contrast to
the images in near-field region for the lowest valence band, non-near-field
images, explicitly following the well-known wave-beam negative refraction law,
have been demonstrated. The absorption and compensation for the losses by
introducing optical gain in these systems have also been discussed. Thus,
extensive applications of such a phenomenon to optical devices are anticipated.
Based on the exact numerical simulation and physical analysis, we have
demonstrated all-angle single-beam left-handed behavior and superlens for both
transverse electric and transverse magnetic modes in a twodimensional coated
photonic crystal. The imaging behaviors by two-dimensional
photonic-crystal-based superlens have been investigated systematically.
Good-quality images and focusing, with relative refractive index of &#8722;1,
have been observed in these systems for both polarized waves. In contrast to
the images in near-field region for the lowest valence band, non-near-field
images, explicitly following the well-known wave-beam negative refraction law,
have been demonstrated. The absorption and compensation for the losses by
introducing optical gain in these systems have also been discussed. Thus,
extensive applications of such a phenomenon to optical devices are anticipated.
