You can just make the substrate extend to the bottom of the computation domain. Have the PML overlap the substrate, and place your observation plane between the PML boundary and the GaAs-Substrate boundary.
You should test the spacing to see how much space is needed between the observation plane and surrounding interfaces. A good starting point is one wavelength on either side, but this may be excessive in certain circumstances (for normal incidence you can get away with less). Matt On Thu, 2 Aug 2007, seathink wrote: > Hi Steven and Meep users, The following structure has a larger glass substrate. The height of the substrate is nearly infinity campared with the SiO2 layer or GaAs layer. To calculate the transmission spectrum, how should we set the height of the substrate, the source position and the position of the observation plane? Thanks a lot. H Wan ******************************************* source plane || \/ air layer --------- SiO2 layer: 300 nm -------- GaAs layer: 250nm -------- Substrate (Glass): 1 mm = 10^6 nm -------- air layer || \/ observation plane ***************************************** _______________________________________________ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
