Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy

Table 2

	Silicon-germanium
Wavelength (μm)	𝜖1	𝜖2
1.6082	12.2183	0.1010
1.7056	12.1366	0.1071
1.8053	12.0684	0.1134
1.9062	12.0101	0.1197
2.0066	11.9616	0.1260
2.2045	11.8855	0.1385
2.4093	11.8269	0.1513
2.6029	11.7842	0.1635
2.8057	11.7485	0.1762
3.0005	11.7216	0.1885
3.2085	11.6976	0.2015
3.3933	11.6804	0.2131
3.6006	11.6639	0.2261
3.8124	11.6501	0.2395
4.0007	11.6397	0.2513
4.2085	11.6300	0.2643
4.4089	11.6217	0.2769
4.6294	11.6133	0.2908
4.8008	11.6077	0.3015
5.0241	11.6021	0.3156
5.4925	11.5915	0.3450
6.0010	11.5821	0.3769
6.5466	11.5754	0.4112
7.0447	11.5701	0.4425
7.5362	11.5654	0.4733
8.0014	11.5627	0.5026
8.5278	11.5592	0.5356
9.0016	11.5572	0.5654
9.9710	11.5536	0.6263
10.9850	11.5504	0.6899
12.0021	11.5484	0.7538