Figure 6
From: Plasmonically Enhanced Reflectance of Heat Radiation from Low-Bandgap Semiconductor Microinclusions
Spectral behavior of insulating composites with low-bandgap semiconductor microinclusions. The spectral reflectance and absorbance of microcomposites with (a,c) Ge and (b,d) PbS spherical inclusions of diameter d and volume fraction f = 0.01, respectively. The solid lines and the thin dotted lines of the same color represent spectral results obtained from the Monte Carlo modeling and Fresnel equations, respectively. In (b,d), the additional dashed and thick dotted curves in yellow color correspond to results computed using Monte Carlo modeling with a microinclusion volume fraction of f = 0.1 and a microcomposite of thickness 2 mm, respectivley. The green arrows indicate the bandgap wavelengths λ bg. In (b,d), a broadbanding of the reflectance spectra can be attributed to the plasmonic resonances arising from the collective oscillations of the free charge carriers generated due to weak absorption bands away from the absorption band edge for λ > λ bg.
