Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy

Table 1

	Germanium
Wavelength (μm)	𝜖1	𝜖2
1.6599	19.010	2.0249×10^−7
1.6847	18.923	2.1484×10^−7
1.708	18.836	2.2699×10^−7
1.7319	18.749	2.3870×10^−7
1.759	18.662	2.5397×10^−7
1.7881	18.576	2.7230×10^−7
1.8194	18.490	2.9136×10^−7
1.8546	18.404	3.1404×10^−7
1.8911	18.318	3.4008×10^−7
1.932	18.233	3.7026×10^−7
1.9776	18.148	4.0761×10^−7
2.0287	18.063	4.5009×10^−7
2.0858	17.978	5.0390×10^−7
2.1516	17.893	5.6782×10^−7
2.2236	17.808	6.4816×10^−7
2.3067	17.724	7.5116×10^−7
2.4073	17.640	8.8826×10^−7
2.5221	17.556	1.0697×10^−6
2.6592	17.472	1.3162×10^−6
2.8429	17.389	1.7170×10^−6
3.0646	17.306	2.3090×10^−6
3.3584	17.222	3.3140×10^−6
3.7684	17.140	5.2143×10^−6
4.387	17.057	9.4583×10^−6
5.3902	16.974	2.0995×10^−5
6.2475	16.933	3.6862×10^−5
7.0839	16.892	5.9312×10^−5
8.0021	16.862	9.3486×10^−5
9.0024	16.830	1.4333×10^−4
9.6026	16.810	1.8172×10^−4
10.01	16.798	2.1033×10^−4
11.033	16.768	2.9662×10^−4
12.405	16.728	4.4412×10^−4