Parik: I met almost the exactly same issue as yours recently and I sent email to Prof. Steven Johnson. Following is his reply:
*EM waves in 3d inhomogeneous structures are not purely polarized in any one direction.* *When you compute the modes in MPB, you can output the electric and magnetic field components and visualize them, and you will see that the orientation necessarily varies at different points in space.* ** *Only in two dimensions do the eigenmodes separate into two polarizations; in that case you can use run-te and run-tm as described in the manual.* *In three dimensions, eigenmodes are not purely polarized so it is not meaningful to specify a polarization.* *See also "symmetry and polarization" in chapter 3 of our book ( jdj.mit.edu/book)* The other point is that you may specify the polarization in CST and obtain the similar results as MPB does. Hope this is helpful to you. Best regards, Yang On Fri, Sep 23, 2011 at 11:00 AM, <[email protected]>wrote: > Send mpb-discuss mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of mpb-discuss digest..." > > > Today's Topics: > > 1. How to fix a certain polarization direction (Parikshit Moitra) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 22 Sep 2011 12:55:00 -0500 > From: Parikshit Moitra <[email protected]> > To: [email protected] > Subject: [MPB-discuss] How to fix a certain polarization direction > Message-ID: > <CA+9SyBi=Gk27bTPg2yxk5R8JNUJzOzpV4QyGDjAq2wur=z_...@mail.gmail.com > > > Content-Type: text/plain; charset="iso-8859-1" > > Hi > > I am trying to simulate multilayered fishnet structure. Here I want to fix > the incident E-field and H-field along x and y direction. > Please let me know if there is any way that I can define the incident > polarization as Ex and Hy, i.e. along the length of the fishnet unit cells. > > thanking you > > Parik > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://ab-initio.mit.edu/pipermail/mpb-discuss/attachments/20110922/4620a95a/attachment-0001.html > > > > ------------------------------ > > _______________________________________________ > mpb-discuss mailing list > [email protected] > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss > > End of mpb-discuss Digest, Vol 67, Issue 2 > ****************************************** > -- Yang Li Research Assistant Center for Nondestructive Evaluation Dept. of Electrical and Computer Engineering Iowa State University Center for NDE Iowa State University 1915 Scholl Road, 151 ASC-II Ames, Iowa 50011-3042
_______________________________________________ mpb-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
