{
  "allowed_materials": [
    "ag",
    "al",
    "al2o3",
    "aln",
    "hfo2",
    "mgf2",
    "si",
    "si3n4",
    "sic",
    "sio2",
    "ti",
    "tio2",
    "zno",
    "zns"
  ],
  "role_to_materials": {
    "metal": [
      "ag",
      "al",
      "ti"
    ],
    "low_index_dielectric": [
      "mgf2",
      "sio2",
      "al2o3"
    ],
    "high_index_dielectric": [
      "hfo2",
      "tio2",
      "zno",
      "zns",
      "si3n4",
      "aln"
    ],
    "lossy_semiconductor": [
      "si",
      "sic"
    ],
    "transparent_spacer": [
      "mgf2",
      "sio2",
      "al2o3"
    ],
    "IR_active": [
      "sic",
      "si",
      "aln",
      "hfo2",
      "zno",
      "al2o3"
    ]
  },
  "material_to_roles": {
    "ag": [
      "metal"
    ],
    "al": [
      "metal"
    ],
    "al2o3": [
      "IR_active",
      "low_index_dielectric",
      "transparent_spacer"
    ],
    "aln": [
      "IR_active",
      "high_index_dielectric"
    ],
    "hfo2": [
      "IR_active",
      "high_index_dielectric"
    ],
    "mgf2": [
      "low_index_dielectric",
      "transparent_spacer"
    ],
    "si": [
      "IR_active",
      "lossy_semiconductor"
    ],
    "si3n4": [
      "high_index_dielectric"
    ],
    "sic": [
      "IR_active",
      "lossy_semiconductor"
    ],
    "sio2": [
      "low_index_dielectric",
      "transparent_spacer"
    ],
    "ti": [
      "metal"
    ],
    "tio2": [
      "high_index_dielectric"
    ],
    "zno": [
      "IR_active",
      "high_index_dielectric"
    ],
    "zns": [
      "high_index_dielectric"
    ]
  },
  "substrate_choices": [
    "si",
    "sio2"
  ]
}