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---------- Forwarded message ---------- From: "Heligman, Daniel M." <heligma...@buckeyemail.osu.edu<mailto:heligma...@buckeyemail.osu.edu>> Date: Sat, Jun 25, 2016 at 7:55 PM -0500 Subject: Help with finding see resonance To: "meep-discuss@ab-initio.mit.edu" <meep-discuss@ab-initio.mit.edu<mailto:meep-discuss@ab-initio.mit.edu>> Hi, I am currently trying to find the resonant frequencies of split ring resonators. I am using harminv, but it is returning values that do not agree with experimental values. Here is my code. (define-param n 5) (define-param w 1) (define-param t 0.5) (define-param sx 12) (define-param sy 12) (define-param sz 12) (define-param g 1) (set! geometry-lattice (make lattice (size sx sy sz) ) ) (set! geometry (list (make block (center 0 (/ (- n w) 2) 0) (size n w t) (material (make perfect-metal) ) ) (make block (center (/ (- w n) 2) 0 0) (size w n t) (material (make perfect-metal) ) ) (make block (center 0 (/ (- w n) 2) 0) (size n w t) (material (make perfect-metal) ) ) (make block (center (/ (- n w) 2) (/ (+ n g) 4) 0) (size w (/ (- n g) 2) t) (material (make perfect-metal) ) ) (make block (center (/ (- n w) 2) (- (/ (+ n g) 4)) 0) (size w (/ (- n g) 2) t) (material (make perfect-metal) ) ) ) ) (set! pml-layers (list (make pml (thickness 2.0) ) ) ) (set-param! resolution 10) (define-param fcen 1) (define-param df 1) (set! sources (list (make source (src (make gaussian-src (frequency fcen) (fwidth df) (size 30 30 no-size) ) ) (component Ey) (center 0 0 4) ) ) ) (run-sources+ 300 (after-sources (harminv Ey (vector3 (/ (- n w) 2) 0 0) fcen df))) Let me know if there is a problem with the location and type of source that I am using, etc. I am trying to excite the LC mode which corresponds to the inductance and capacitance of the resonator and has a resonance of 1/sqrt(LC). Best, Daniel Heligman Get Outlook for iOS<https://aka.ms/o0ukef>
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