A reflector, a method of producing same and a method of creating high omnidirectional
reflection for a predetermined range of frequencies of incident electromagnetic
energy for any angle of incidence and any polarization. The reflector includes
a structure with a surface and a refractive index variation along the direction
perpendicular to the surface while remaining nearly uniform along the surface.
The structure is configured such that i) a range of frequencies exists defining
a photonic band gap for electromagnetic energy incident along the perpendicular
direction of said surface, ii) a range of frequencies exists defining a photonic
band gap for electromagnetic energy incident along a direction approximately 90
from the perpendicular direction of said surface, and iii) a range of frequencies
exists which is common to both of said photonic band gaps. In an exemplary embodiment,
the reflector is configured as a photonic crystal.
