Photonic crystal waveguides: Out-of-plane losses and adiabatic modal conversion

Palamaru, M.; Lalanne, Ph.
March 2001
Applied Physics Letters;3/12/2001, Vol. 78 Issue 11, p1466
Academic Journal
An accurate model for the out-of-plane radiation losses occurring when a guided wave propagating in a conventional waveguide impinges on a photonic crystal waveguide is presented. The model makes clear that the losses originate from insertion losses resulting from a mode mismatch. A generic taper structure realizing an adiabatic modal conversion is proposed and validated through numerical computations for cavities with large Q's and large peak transmission. © 2001 American Institute of Physics.


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