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- W1966023457 abstract "Mid-infrared optical absorption spectra of Ge/Si quantum dot structures in polarized light were obtained under conditions of additional interband optical excitation. Photo-excited electron-hole pairs captured to quantum dots cause mid-infrared absorption changes for certain light polarization in spectral range of 0.25 – 0.6 eV. The sign of the effect is found to be different in different spectral ranges. There is an increase of absorption at the long-wavelength edge of the spectrum and a decrease of absorption at the short-wavelength edge. Absorption increase is considered to be related to contribution of optical transitions of non-equilibrium holes from the quantum dot ground states, while absorption decrease is associated with suppression of interband-like processes with generation of hole inside the dot and bound electron outside of the dot under conditions of full occupation of appropriate discrete states." @default.
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- W1966023457 date "2015-01-30" @default.
- W1966023457 modified "2023-09-27" @default.
- W1966023457 title "Mid-infrared light absorption by photo-excited charge carriers in Ge/Si quantum dots" @default.
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- W1966023457 doi "https://doi.org/10.1088/1742-6596/586/1/012001" @default.
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