Revision as of 23:16, 19 June 2012 edit Photonique (talk \| contribs) Extended confirmed users 1,076 edits m copy edit. Add note on spectral ___domain algorithms.. ← Previous edit		Revision as of 14:55, 26 June 2012 edit undo Vbrulis (talk \| contribs) 73 edits No edit summary Next edit →
Line 46: used only in solving for intensity and modes within shaped (bent, tapered, terminated) waveguide structures, as opposed to scattering problems. These structures typically consist of [[isotropic]] optical materials, but the BPM has also been extended to be applicable to simulate the propagation of light in general [[anisotropic]] materials such as [[liquid crystals]]. This allows to [http://www.elis.ugent.be/ELISgroups/lcd/research/bpm.php analyze] e.g. the polarization rotation of light in anisotropic materials, the tunability of a directional coupler based on liquid crystals or the light diffraction in LCD pixels. ==Limitations of BPM== The beam propagation method relies on the [[slowly varying envelope approximation]], and is inaccurate for the modelling of discretely or fastly varying structures. It is also inaccurate for the modelling of structures with a high-index contrast, for instance in [[silicon photonics]]. More rigorous alternatives include [[Eigenmode Expansion]] and [[FDTD]]. ==BPM software==

Beam propagation method: Difference between revisions