Dear Nirmala, the time of propagation is given by the group velocity of the signal in the structure times the structure size.
Note the group velocity may be significantly (10x-100x) slower that the speed of light if you compute it near the edge of the pass band. If there were any resonances, they might take very long to decay sufficiently, depending on their quality. Assuming there are none, let us give the simulation time as 5*size, and increase this value if the signal gets clipped. This is observed as characteristic ringing in the spectra. Filip 2015-03-26 10:22 GMT+01:00, nirmala dsouza <[email protected]>: > Sir, > > Using meep, I had designed a 2d photonic crystal with dielectric rods in > air for gate application . It has two inputs and one output. These two > inputs (sources) are applied at each end of the two waveguides and the > other end is connected to the output waveguide. It is like a Y shaped PC > waveguide. Now I want to calculate , how much time the device will take > responds to the input signals ? > > > Nirmala > > On Thu, Mar 26, 2015 at 12:35 PM, Filip Dominec <[email protected]> > wrote: > >> Hi, Nimala, >> perhaps it is possible. Could you specify your task in more specific >> words, please? >> The custom source can be easily found on the net, e.g. >> >> http://comments.gmane.org/gmane.comp.science.electromagnetism.meep.general/3936 >> Filip >> >> 2015-03-26 3:57 GMT+01:00, nirmala dsouza <[email protected]>: >> > I want to calculate response time of a photonic crystal optical gate. >> > Is >> it >> > possible to calculate this using meep? If Yes , please help me to find >> > this. I also want to know code for giving a square pulse in meep >> (scheme) >> > >> > >> > >> > Nirma >> > >> > _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
