Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-03-27
Phys. Rev. A 76, 013824 (2007).
Physics
Condensed Matter
Other Condensed Matter
5 pages, 9 eps figs in RevTex format
Scientific paper
10.1103/PhysRevA.76.013824
We show that with an appropriate surface modification, a slab of photonic crystal can be made to allow wave transmission within the band gap. Furthermore, negative refraction and all-angle-negative-refraction (AANR) can be achieved by this surface modification in frequency windows that were not realized before in two-dimensional photonic crystals [C. Luo et al, Phys. Rev. B 65, 201104 (2002)]. This approach to AANR leads to new applications in flat lens imaging. Previous flat lens using photonic crystals requires object-image distance u+v less than or equal to the lens thickness d, u+v d. Our approach can be used to design flat lens with u+v=sd with s>>1, thus being able to image large and/or far away objects. Our results are confirmed by FDTD simulations.
Huang Jing-Ying
Lu Wei-Tao
Sridhar Srinath
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