Theoretical Background of Photonic Crystals: Bandgap and Dispersion Properties
Pp. 3-22 (20)
Photonic crystals (PhCs), able to manipulate light at a scale on the order of the wavelength or
even shorter, have the potential for developing new technologies and devices for a wide range of
applications. In particular, PhCs have been used to investigate, both theoretically and experimentally,
photonic sensors because of their peculiar properties, such as the capability of enhancing field-matter
interaction and control over the group velocity. In this chapter the basic physics of photonic crystals with
specific reference to the origin of the photonic band gap and to their design for achieving specific dispersion
properties, is reviewed.
Photonic crystals, photonic band gap, photonic crystals applications.
Optoelectronics Laboratory, Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari, Via Re David, 200, 70125 Bari, Italy