Photonic Bandgap Glass-Based Structures
- Pp. 107-130 (24)M. Clara and Amadeu Griol
Photonic crystals (PCs) as it is often called photonic band gap materials (PBGs), are artificial composite materials, micro/nanostructured on an optical length scale (e.g. few hundreds of nm). The resulting periodicity in the dielectric constant is responsible for inhibiting light from propagating through the material as a result of Bragg diffraction. The forbidden frequency range is called a stop band. In PCs the electromagnetic waves within the band gap are completely reflected by the crystal, while spontaneous emission (within the band gap) are totally concealed. </p><p> This chapter introduces the physical concepts behind PC structures, along with bottomup fabrication methods, properties, and applications.