Yes. I know that we can observe small oscillation, when amplitude is small (especially on edge of source spectrum). But even for different resolutions (even better) I have got oscillations in middle frequency region as well. And that oscillations are quite big. And I have found that the position of detector regards to PhC and source influence on this phenomena. Unfortunately sent graph include only the best result. I was wondering how I can solve this problem. I think the best option will be try do this work for few different sources with different central frequency. And assemble results to one to compare with result for one wider source. It is idea, I try in near future. Anyway I wonder what causing this problem, not this small oscillation on edge of spectrum, but this big oscillation in middle.
Thank you, Szymon ___________ Szymon Lis Photonics Group Faculty of Microsystem Electronics and Photonics Wroclaw University of Technology ul. Janiszewskiego 11/17, 50-372 Wroclaw, POLAND Tel. +48 (71) 320 3735 Fax. +48 (71) 328 3504 ----- Original Message ----- From: "G. O. Nikiforov" <[EMAIL PROTECTED]> Date: Monday, December 8, 2008 1:50 pm Subject: Re: [Meep-discuss] Oscillation in reflection spectrum To: Szymon Lis <[EMAIL PROTECTED]> Cc: meep discuss <[email protected]> > Dear Szymon, > > Just glancing at your graph, those oscillations resemble very much the > > oscillations in one of the Meep examples: > > http://ab-initio.mit.edu/wiki/index.php/Meep_Tutorial/Band_diagram%2C_resonant_modes%2C_and_transmission_in_a_holey_waveguide > > The explanation they give is: "There is also some high-frequency > oscillation visible at the left of the plot, which is a numerical > artifact due to our pulse not having enough amplitude in that range." > > It looks like you are seeing a similar thing. > > George > > Szymon Lis wrote: > > Hi Meep users, > > > > My problem in meep are strange oscillation in reflection spectrum > form cavity waveguide. The reflection graph are attached. That is my > the best result. When I try different resolution, or/and various > distances between source and phc oscillation are bigger. Even reach > 1.4 reflection!. I don't know what exactly it is? Numerical error? How > to avoid it? > > > > Thank you. > > Szymon > > > > > > ___________ > > Szymon Lis > > Photonics Group > > Faculty of Microsystem Electronics and Photonics > > Wroclaw University of Technology > > ul. Janiszewskiego 11/17, 50-372 Wroclaw, POLAND > > > > Tel. +48 (71) 320 3735 > > Fax. +48 (71) 328 3504 > > > > > > ------------------------------------------------------------------------ > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > meep-discuss mailing list > > [email protected] > > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss > _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
