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- W2065656318 abstract "It is shown that the IR emission spectrum of free carriers in semiconductors below the fundamental absorption edge (ω < Egh; Eg is the forbidden band gap) can take the form of a curve with a maximum whose position is determined by the sample thickness, doping level and scattering mechanism in the material. In optically thick crystals (Kλd > 1; Kλ, is absorption coefficient and d is the semiconductor plate thickness) the emissive flux power at the maximum, allowing for reflection, reaches the black body emissive power. With decreasing crystal thickness or doping level (at a fixed temperature) the position of the maximum in the spectrum shifts to the long-wavelength region; at the same time the emission flux power falls off, while the spectral characteristic becomes less selective, mainly due to a decreasing contribution of high-frequency emission. The experiment was carried out on n-type germanium plates (5 × 1016 ⩽ Nd − Na ⩽ 5 × 1018cm−3; 0.2 ⩽ d ⩽ 10mm) in a spectral range 5 ⩽ λ ⩽ 25μm at 310 ⩽ T ⩽ 450 K." @default.
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- W2065656318 date "1989-01-01" @default.
- W2065656318 modified "2023-09-23" @default.
- W2065656318 title "Infrared emission of free carriers in semiconductors below the fundamental absorption edge" @default.
- W2065656318 cites W2326875190 @default.
- W2065656318 doi "https://doi.org/10.1016/0020-0891(89)90018-3" @default.
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