Effects of non-synchronized variations of electric and magnetic properties on transmitted waves at lossy interface

Review of thermal infrared polarimetry, I: theory

“…( 25) we can calculate the complex angle θ1 that is needed for the general Fresnel equations Eq. (31). Because β ¼ expð−αb∕ cos θ 1 Þ is a function of the material thickness b, we find that, for small values of thickness, ε increases approximately linearly with b, but that as b becomes large, β approaches zero, and the emissivity approaches an asymptotic value.…”

“…5 Fresnel intensity reflection ρðθÞ, transmission τðθÞ, and modulation μðθÞ terms, calculated for light emitted into air from within (a) silica and (b) alumina, using Eqs. ( 30), (31), and (34).…”

“…Researchers who discuss the mixed Poynting vector almost universally assert that μ is "small" and therefore can be neglected. [28][29][30][31] However, if one proceeds to substitute n; k values for example materials into Eq. ( 34), one quickly finds that μ can be surprisingly large in the thermal infrared domain for a wide class of materials.…”