Nonreciprocal magnetic photonic crystals
Abstract
We study band dispersion relations ω(k-->) of a photonic crystal with at least one of the constitutive components being a magnetically ordered material. It is shown that by proper spatial arrangement of magnetic and dielectric components one can construct a magnetic photonic crystal with strong spectral asymmetry (nonreciprocity) ω(k-->)≠ω(-k-->). The spectral asymmetry, in turn, results in a number of interesting phenomena, in particular, one-way transparency when the magnetic photonic crystal, being perfectly transparent for a Bloch wave of frequency Ω, ``freezes'' the radiation of the same frequency Ω propagating in the opposite direction. The frozen radiation corresponds to a Bloch wave with zero group velocity ∂ω(k)/∂k=0 and, in addition, with ∂2ω(k)/∂k2=0.
- Publication:
-
Physical Review E
- Pub Date:
- June 2001
- DOI:
- 10.1103/PhysRevE.63.066609
- Bibcode:
- 2001PhRvE..63f6609F
- Keywords:
-
- 42.70.Qs;
- 41.20.-q;
- 84.40.-x;
- Photonic bandgap materials;
- Applied classical electromagnetism;
- Radiowave and microwave technology