Two-dimensional photonic crystals composed of two orthogonal volume diffraction gratings have been photogenerated in photopolymers. When the read beam is set at the Bragg angle, the diffraction efficiency of the transmission grating is strongly enhanced at the band edge of the reflection grating recorded in the material. Such a device provides Bragg operation and enhancement of the diffraction efficiency of the thin diffraction grating together with good wavelength selectivity. Such advantages could be interesting for optical signal processing.
© 2006 Optical Society of America
Diffraction and Gratings
Original Manuscript: December 8, 2005
Manuscript Accepted: December 26, 2005
Qiong He, Isabelle Zaquine, Alain Maruani, Sébastien Massenot, Raymond Chevallier, and Robert Frey, "Band-edge-induced Bragg diffraction in two-dimensional photonic crystals," Opt. Lett. 31, 1184-1186 (2006)