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- W1988544858 abstract "The extrinsic optical properties were investigated in homogeneous GaP crystals at room temperature. The transmission of extrinsic light is influenced by a simultaneous illumination of an additional light of different frequency. This light changes the occupancy of an impurity level. A simple theory is given, which relates this change in transmission of the extrinsic light to the optical cross sections of the impurity level. We had to use steady light because of the large relaxation time, but still obtained a resolution of 2 × 10−5 in the relative transmission change. The spectral dependence of the optical cross sections for an impurity level 0·9 eV below the conduction band were calculated. Another level approximately 1·85 eV from a band edge was also seen in these measurements, but it had complex optical properties. Both levels were seen in a direct measurement of the absorption coefficient." @default.
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- W1988544858 date "1972-01-01" @default.
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- W1988544858 title "Impurity absorption in gallium phosphide doped with zinc and oxygen" @default.
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- W1988544858 doi "https://doi.org/10.1016/0022-3697(72)90063-7" @default.
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