w/ 2 levels &quot;M.par&quot;,&quot;M.perp&quot;: 1 1 1 1 1 1 1 1 1 1 ...
##  $ value   : num  0.111 0.11 0.11 0.109 0.109 ...
##  $ L1      : Factor w/ 3 levels &quot;glass&quot;,&quot;metal&quot;,..: 1 1 1 1 1 1 1 1 1 1 ...
##  $ material: Factor w/ 3 levels &quot;n2&quot;,&quot;metal1&quot;,..: 1 1 1 1 1 1 1 1 1 1 ...</code></pre>
<p>A strong electric field can be noted, particularly for the perpendicular component, which decays exponentially from the metal-air interface: this is characteristic of the ex