For Figure  6a, file 6.1 shows data points of computationally caclulated grating mode without oscillation strength.
For figure 6b, file 6.2 shows experimentally calculated transmission spectra of different bands. 

% file 6.1


%gating_mode_funct

Wavenumber (cm-1)
1282.50000000000
1318.25000000000
1359.50000000000
1402.75000000000
1448
1495
1545.50000000000
1596.75000000000
1650
1710
1767.50000000000
1827
1890
1953.50000000000

% file 6.1

%band1

Wavenumber (cm-1)
1266
1312
1352
1390
1405
1424
1444
1445
1445
1445
1446
1447
1448
1448

%band2

Wavenumber (cm-1)
1449
1450
1450
1451
1454
1460
1471
1480
1483
1483
1483
1483
1483
1483

%band3

Wavenumber (cm-1)
1485
1485
1486
1486
1488
1494
1506
1561
1593
1660
1658
1702
1702
1705

%band4

Wavenumber (cm-1)
1727
1727
1727
1728
1728
1730
1730
1730
1730
1745
1763
1818
1838
1872