{
 "note": "k for half-width 1; cutoff pi/2. From code/trapped.py (cell-centred FD, eigsh). extrapolated = 2*k(h/2)-k(h), assuming error ~h.",
 "cutoff": 1.5708,
 "plates": {
  "0.5": {
   "h0.05": 1.41228,
   "h0.025": 1.41913,
   "h0.0125": 1.42249,
   "extrapolated": 1.4258
  },
  "1.0": {
   "h0.05": 1.03791,
   "h0.025": 1.04357,
   "h0.0125": 1.04639,
   "extrapolated": 1.0492
  },
  "2.0": {
   "h0.05": 0.63437,
   "h0.025": 0.63665,
   "h0.0125": 0.63779,
   "extrapolated": 0.6389
  }
 }
}