Detectivity of plasmonic enhanced photodetectors based on nondegenerate two-photon absorption process
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Plasmonic enhanced two-photon absorption in silicon photodetectors for optical correlators in the near-infrared.
A high-density array of plasmonic coaxial nanoantennas is used to enhance the two-photon absorption (TPA) process in a conventional silicon photodetector from a mode-locked 76 MHz Ti:sapphire laser over a spectral range from 1340 to 1550 nm. This enhanced TPA was used to generate an interferometric autocorrelation trace of a 150 fs laser pulse. Unlike second-harmonic generation, this technique ...
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تاریخ انتشار 2017