عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Photonic crystals are artificial dielectric materials with a periodic
refractive index and new electromagnetic properties. These crystals
have shown that due to the Bragg scattering in a periodic dielectric
structure, there would be an answer in the form of photonic band gap.
These gaps don’t let the photons to the appeared in a specified energy
region. When the frequency of the network breaks by using a defect, a
localized defect appears in the range of band gap, whichleads to a
change in the behavior of light. These changes are determined by the
nature and type of defect.