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 μm in size for λ ~ 700 nm, and can serve as a dispersive element for building ultracompact miniature spectrometers.
© 1996 Optical Society of America
Original Manuscript: July 5, 1996
Published: November 1, 1996
Shawn-Yu Lin, V. M. Hietala, Li Wang, and E. D. Jones, "Highly dispersive photonic band-gap prism," Opt. Lett. 21, 1771-1773 (1996)