Effect of a photonic band gap on scattering from waveguide disorder

Povinelli, M.L.; Johnson, Steven G.; Lidorikis, Elefterios; Joannopoulos, J.D.; Soljačić, Marin
May 2004
Applied Physics Letters;5/3/2004, Vol. 84 Issue 18, p3639
Academic Journal
We derive a general, analytical, coupled-mode theory for disorder-induced scattering in periodic systems that shows that in the experimentally relevant limit of weak disorder, the reflection in a photonic-crystal waveguide is just as low as in a comparable index-guided waveguide. Moreover, since the photonic band gap also blocks radiative loss, the total scattering loss is reduced, and the total transmission is higher. These general results are verified by direct numerical simulations in an example system. © 2004 American Institute of Physics.


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