Abstract
It has been suggested that a subwavelength image can be realized by a photonic crystal slab with a square lattice in the lowest band. However, due to the anisotropy of dispersion in such a photonic structure, the image only appears in the near-field region. In this paper, we show that subwavelength far-field focusing and imaging, explicitly following the well-known wave-beam negative refraction law with relative refractive index of -1, can also be realized by a square photonic crystal through choosing suitable scatterers for the lowest valence band.
Original language | English |
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Article number | 037601 |
Journal | Physical Review E |
Volume | 71 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2005 |
Externally published | Yes |