Lin Lan, Wang Wei, Cui Jianhua, Du Chunlei, Luo Xiangang
State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics and Electronics,Chinese Academy of Sciences, Chengdu 610209, China.
Opt Express. 2008 May 12;16(10):6815-21. doi: 10.1364/oe.16.006815.
We designed an electromagnetic refractor and a phase transformer using form-invariant coordinate transformation of Maxwell's equations. The propagation direction of electromagnetic energy in these devices can be modulated as desired. Unlike the conventional dielectric refractor, electromagnetic fields at our refraction boundary do not conform to the Snell's law in isotropic materials and the impedance at this boundary is matched which makes the reflection extremely low; and the transformation of the wave front from cylindrical to plane can be realized in the phase transformer with a slab structure. Two dimensional finite-element simulations were performed to confirm the theoretical results.
