Analyses of negative refraction in the partial bandgap of photonic crystals.
We consider the conditions for negative refraction in the partial bandgap of photonic crystals and show that, in contrast to previously published studies, anisotropy is not a necessary condition for negative refraction, and that unrestricted imaging is possible. This analysis is made possible by the introduction of a negative local wavevector. In addition, we analyze the origins of the previously reported restricted and adjacent imaging properties and extend negative refraction to higher bands.
Sun
Guilin
G
Department of Electrical and Computer Engineering, McGill University, Montreal, Canada, H3A 2A7. guilin.sun@mail.mcgill.ca
Kirk
Andrew G
AG
D003460:Crystallization; D008027:Light; D008962:Models, Theoretical; D017785:Photons; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation