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- W2077488522 abstract "Nonlinear optical characterization of Hg1−xCdxTe using two-photon absorption (TPA) techniques with CO2 lasers has been achieved for samples with x≊0.32. Photo-Hall data have been used to determine the number of TPA photoexcited electrons at 10 K and ℏω≊133 meV. Measurement of the carrier lifetime of 7 μs then enabled a TPA coefficient of 1.5 cm/MW to be directly determined. Nonlinear TPA cutoff wavelengths or band gap energies were determined for the first time by varying (1) the photon energy and (2) the lattice temperature while monitoring the photoconductive amplitude. Analysis of the results allows the energy gap or x value to be extracted with a precision of Δx=±0.001. The temperature dependence of the photoconductive amplitudes and lifetimes are shown to give information about recombination mechanisms connected with impurity or defect levels and traps." @default.
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- W2077488522 date "1986-07-01" @default.
- W2077488522 modified "2023-10-18" @default.
- W2077488522 title "Nonlinear optical characterization of Hg1−xCdxTe using two‐photon absorption techniques" @default.
- W2077488522 doi "https://doi.org/10.1116/1.574022" @default.
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