Photonic bandgap structures can also be utilized for the realization of transformational optical devices like metamaterials. In this Letter, the possibility of cylindrical to plane wave source transformation in an open cavity formed by one dimensional photonic crystal is demonstrated. It is observed that the gap solitary wave behavior at the near-bandgap regime is fair enough to produce highly directional plane waves out of the point source placed inside the open cavity. The limitations of such a source transformation device are governed by the strength of the bandgap that decides the amplitude of the emitted plane waves.
© 2011 Optical Society of America
Original Manuscript: January 20, 2011
Revised Manuscript: April 4, 2011
Manuscript Accepted: April 4, 2011
Published: April 29, 2011
N. Yogesh and V. Subramanian, "Source transformation device formed by one-dimensional photonic crystal," Opt. Lett. 36, 1737-1739 (2011)