Photonic crystal waveguides: Out-of-plane losses and adiabatic modal conversion
- 12 March 2001
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 78 (11) , 1466-1468
- https://doi.org/10.1063/1.1354666
Abstract
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.Keywords
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