Photonic forbidden band in volume hologram

摘要

The concept and analyzing method of photonic crystals and band gap were introduced into optical holography. Volume holograms were treated theoretically as a photonic crystal. All properties of volume holograms can be explained accurately with the band structure of photonic crystal. Different from superlattice photonic crystal, the inductivity of holographic photonic crystal is a graded function rather than a discontinuous function, the band gap structures with changing incident angle (not for a fixed angle only) were discussed. Experimental verifications were implemented by using elementary reflection holograms. It shows that the analysis of band gap for volume holograms is in good consistency with the experimental results.