Dear meep users, I asked a question yesterday but nobody replied.
Let me explain my question a little more. I am trying to calculate the near
field enhancement of a sphere with radius 25nm at a single point. You can see
the figure in the attachment. The polarization of the source is Ex. I defined
a volume region around the sphere and output Ex, Ey and Ez in the same volume
region. I used the following formula for the enhancement i.e.
Enhancement=abs(Ex)^2+abs(Ey)^2+abs(Ez)^2. The part of the code is given below.
I am not sure about the code because i got very small value of the near field
enhancement. Can somebody tell me, is there anything wrong with the code?
(set! sources (list (make source (src(make
continuous-src (wavelength 5.28) (width 2.64))) (component Ex)
(center 0 0 -1) (size 2.5 2.5 0) )
))(run-until 100(at-beginning output-epsilon)(in-volume (volume (center 0 0 0)
(size 0.25 0 0)) (to-appended "ex" (at-end output-efield-x)))(in-volume (volume
(center 0 0 0) (size 0.25 0 0)) (to-appended "ey" (at-end
output-efield-y)))(in-volume (volume (center 0 0 0) (size 0.25 0 0))
(to-appended "ez" (at-end output-efield-z))))Best regards,Hogen From: [email protected] To: [email protected] Date: Wed, 23 Mar 2011 20:16:19 +0000 Subject: [Meep-discuss] Confused about the 'in-volume' command Dear meep users, I want to calculate the Near field enhancement of a sphere with 25nm radius (0.25 in meep units) at a single point. For this i defined a volume region around the sphere by using th (in-volume) command. The sphere is placed in the center of the computational cell. (set! sources (list (make source (src(make continuous-src (wavelength 5.28) (width 2.64))) (component Ex) (center 0 0 -1) (size 2.5 2.5 0) ) ) )(run-until 100 (at-beginning output-epsilon) (in-volume (volume (center 0 0 0) (size 0.25 0 0)) (to-appended "ex" (at-end output-efield-x))) (in-volume (volume (center 0 0 0) (size 0.25 0 0)) (to-appended "ey" (at-end output-efield-y))) (in-volume (volume (center 0 0 0) (size 0.25 0 0)) (to-appended "ez" (at-end output-efield-z))) ) I obtained the a very small value of the near field enhancement. Can somebody tell me is there anything wrong with the code? I am a little doubtful about the in-volume. Please somebody clarify it. Thanks,Best Regards,Hogen _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
<<attachment: nearfield-dpwr.t50.png>>
_______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
