title: Highly dispersive photonic band-gap prism.
abstract: We propose the concept of a photonic band-gap (PBG) prism based on two-dimensional PBG structures and realize it in the millimeter-wave spectral regime. We recognize the highly nonlinear dispersion of PBG materials near Brillouin zone edges and utilize the dispersion to achieve strong prism action. Such a PBG prism is very compact if operated in the optical regime, ~20 mm in size for lambda ~ 700 nm, and can serve as a dispersive element for building ultracompact miniature spectrometers.
authors.forename: S Y
authors.initials: SY
authors.lastname: Lin
authors.forename: V M
authors.initials: VM
authors.lastname: Hietala
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.forename: E D
authors.initials: ED
authors.lastname: Jones