Model of light collimation by photonic crystal surface modes

Details Model of light collimation by photonic crystal surface modes Model of light collimation by photonic crystal surface modes

2006-12-27

arxiv.org/abs/cond-mat/0612652v3

Phys. Rev. B 75, 205430 (2007)

Physics

Condensed Matter

Materials Science

6 pages, 7 figures. Version 2: corrected sign of k_x' (sections 4-6, fig. 2), minor clarifications in section 2. Version 3: si

Scientific paper

10.1103/PhysRevB.75.205430

We propose a quantitative model explaining the mechanism of light collimation by leaky surface modes that propagate on a corrugated surface around the output of a photonic crystal waveguide. The dispersion relation of these modes is determined for a number of surface terminations. Analytical results obtained on the basis of the model are compared to those of rigorous numerical simulations. Maximum collimation is shown to occur at frequency values corresponding to excitation of surface modes whose wave number retains a nonzero real part.

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