- This topic has 12 replies, 2 voices, and was last updated 10 years, 2 months ago by Saurav Chanda.
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October 8, 2014 at 1:01 pm #14102Saurav ChandaParticipant
Hey everyone I need a bit of assistance. I’m not able to figure out the 2D FDTD Band Solver Parameter under the simulation option of the software. I’m in very need of that, even though it has been mentioned in the user manual of the documentation file.
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October 9, 2014 at 8:51 am #14120Damian MarekParticipant
Have you looked at the tutorial yet?
You managed to create the crystal structure I imagine but you are not sure how to use the band solver? Is there a specific problem you are experiencing?
Regards
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October 9, 2014 at 1:31 pm #14127Saurav ChandaParticipant
Yes I am able to use the PWE Band solver but as I am using non-linear rods so I think I should use FDTD band solver to get hold of the band diagram. I have Version 8,10,12 with me but I am not able to figure out that option under the simulation tab. Even I have installed the software package from Optiwave too but even its missing over there also.
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October 9, 2014 at 3:20 pm #14128Damian MarekParticipant
Ah, the 2D FDTD band solver was removed from the software, because it did not provide any extra functionality. If you think that the PWE band solver will not accurately find the bandgaps of your nonlinear crystal then I would suggest performing a straight FDTD transmission simulation.
And of course there is a tutorial for the procedure:
Sorry for the misinformation, the documentation will be updated.
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October 10, 2014 at 10:35 am #14134Saurav ChandaParticipant
Well I have got one new software package having the version 8 where the FDTD band solver parameter is active but I encountered one problem that is it takes only one vale of ‘K’ i.e wave vector. Can you please provide me the Opti FDTD version 12. I have got one but its a trial version for 30days. And thanks for providing me the information alongwith the references.
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October 10, 2014 at 10:54 am #14138Damian MarekParticipant
Hi Saurav,
Currently we are allowing free downloads of our 32 bit version of OptiFDTD:
If you would like the 64 bit version then you will have to purchase a licensed version. To get a quote please email info@optiwave.com.
Regards
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October 10, 2014 at 10:38 am #14136Saurav ChandaParticipant
This is the snap I’m attaching.
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October 10, 2014 at 11:13 am #14139Saurav ChandaParticipant
Yes I have got the 32 bit version. I have one more query, how to set the kerr non-linearity directly if the value is n2=1.5×10^(-5)? I have got the non-linearity option under profiles and materials but I didn’t get the option where I can set the value directly.
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October 10, 2014 at 11:56 am #14140Damian MarekParticipant
Under the FDTD-Nonlinear folder right click and create a new Material. From there you can choose whether it is a 2nd, 3rd, Kerr … type material. Since you only have the nonlinear index that means to me that you would be making a 3rd order material. You then just need to convert the index to a susceptibility. You can find the calculation on the web.
Regards
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October 11, 2014 at 5:07 am #14171Saurav ChandaParticipant
Okay, but the plane wave simulation is not clear to me.
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October 14, 2014 at 9:50 am #14199Damian MarekParticipant
What is the issue with the plane wave simulation?
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October 11, 2014 at 5:12 am #14172Saurav ChandaParticipant
I will be using kerr non-linearity.
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October 16, 2014 at 11:20 am #14287Saurav ChandaParticipant
FDTD transmission simulation is not clear to me.
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