Re: [Meep-discuss] how to define the infinite substrate in the calculation of transmission spectrum?

[matt]

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

*

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[Meep-discuss] Optimum number of processors

[Fernando Souto]

Hello everyone,
Im trying to run some simulations using a linux-cluster system. Ive been
trying to find out what is the optimal number of processors to run my
simulations, but so far, the fastest simulation was performed by a single
processor followed by 8. Does anyone know if there is an optimum number of
processors? I have also tried to run the benchmark command included in meep,
but this does not seem to work because it looks like the more processors i
use, the more time it takes. Is there a way of optimizing the ctl file for
parallel processing?
Regards,

Fernando Souto
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