Three-dimensional photonic-bandgap crystals are used to design and fabricate uniquely directional sources and receivers. By utilizing the resonances of a Fabry–Perot cavity formed with photonic-bandgap crystals, we were able to create exceptionally directional sources by placing the sources within such a cavity. Very good agreement between finite-difference time-domain calculations and the experiment is obtained. Radiation patterns with half-power beam widths of less than 12 degrees were obtained.
© 2001 Optical Society of America
(050.2230) Diffraction and gratings : Fabry-Perot
(230.5750) Optical devices : Resonators
(260.2110) Physical optics : Electromagnetic optics
(270.1670) Quantum optics : Coherent optical effects
R. Biswas, E. Ozbay, B. Temelkuran, Mehmet Bayindir, M. M. Sigalas, and K.-M. Ho, "Exceptionally directional sources with photonic-bandgap crystals," J. Opt. Soc. Am. B 18, 1684-1689 (2001)