Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1543202 | Photonics and Nanostructures - Fundamentals and Applications | 2011 | 13 Pages |
Identifying the origins of the large propagation losses in substrate-type photonic crystal waveguides and subsequently reducing them by means of structural optimization requires a numerical model, which is flexible and accurate enough to allow a quantitative comparison. In this article we discuss the applicability of the cutback-method on numerical transmission spectra obtained from the 3D finite difference time domain (FDTD) method. We present two different implementations of the cutback-method and discuss their suitability to predict the propagation losses of fabricated structures. We compare the computed propagation losses with experimental data and find a remarkable agreement for almost the entire single mode regime of single line-defect waveguides.
► Accurate computation of the propagation losses of very lossy photonic waveguides. ► Application of the cutback-method for numeric computation of propagation losses. ► Verification of numeric FDTD results by a comparison to experimental data. ► Detailed error estimation of the simulation results.