Figure 1
RMS energy fluctuations (left axis) and detectivity (right axis) for a material that absorbs perfectly within a small wavelength range centered at λ=10 µm but has zero absorption outside that range. The integration was taken over a hemisphere rather than the full sphere of Equation (8), and the detector thermal emission was assumed to be Lambertian. The background was taken as a perfect blackbody at 290 K (blue), 800 K (green) and 1300 K (red). The detector temperature was assumed to be 290 K. RMS, root mean square.
