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Alternative Approach To All-Angle Negative Refraction In Two-Dimensional Photonic Crystals, Y. Huang, W. Lu, S. Sridhar
Alternative Approach To All-Angle Negative Refraction In Two-Dimensional Photonic Crystals, Y. Huang, W. Lu, S. Sridhar
Srinivas Sridhar
We show that with an appropriate surface modification, a slab of photonic crystal can be made to allow wave transmission within the photonic 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 …