Photonic crystals are artificial structures that have periodic dielectric components with different refractive indices.
Under certain conditions, they abnormally refract the light, a phenomenon called negative refraction. Here, we
discuss recent theoretical and simulation results that showed that negative refraction could be present near the low
frequency edge of at least the second, fourth and sixth bandgaps of a lossless one-dimensional photonic crystals (1DPC)
structure. That is, negative refraction is a multiband phenomenon. We also discuss the negative refraction
correctness condition that gives the angular region where negative refraction occurs. We compare two current
negative refraction theoretical models with recent experimental results. In order to succeed, an output refraction
correction is utilized. The correction uses Snell’s law and an effective refractive index based on two effective
dielectric constants. We found good agreement between experiment and both theoretical models in the negative
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J. E. Lugo ; Rafael Doti and J. Faubert
Negative refraction in one-dimensional photonic crystals
", Proc. SPIE 8412, Photonics North 2012, 84121W (October 23, 2012); doi:10.1117/12.2001446; http://dx.doi.org/10.1117/12.2001446