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    Mid-infrared two photon absorption sensitivity of commercial detectors

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    Boiko, Dmitri L.; Antonov, Alexander V.; Kuritsyn, D. I.; Yablonskiy, A. N.; Sergeev, S. M.; Orlova, E. E.; Vaks, Vladimir V.
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    Abstract
    We report on broad-band two-photon absorption (TPA) in several commercially available MIR inter-band bulk semiconductor photodetectors with the spectral cutoff in the range of 4.5–6??m. The highest TPA responsivity of 2?×?10?5?A·mm2/W2 is measured for a nitrogen-cooled InSb photovoltaic detector. Its performance as a two-photon detector is validated by measuring the second-order interferometric autocorrelation function of a multimode quantum cascade laser emitting at the wavelength of 8??m.
    Publication Reference
    Applied Physics Letters, vol. 111 (17), pp. 171102
    Year
    2017-10-23
    URI
    https://yoda.csem.ch/handle/20.500.12839/886
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