An on-chip GaAs/AlGaAs source produces spectrally anti-correlated photon pairs near 1960 nm, with the first direct joint-spectral-intensity measurement of an integrated SPDC source in the 2 um band.
Silicon-Based Photonic Integration Beyond the Telecommunication Wavelength Range,
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Joint spectral characterization of SPDC photon pairs near 2 $\mu$m in (Al)GaAs-on-insulator waveguides
An on-chip GaAs/AlGaAs source produces spectrally anti-correlated photon pairs near 1960 nm, with the first direct joint-spectral-intensity measurement of an integrated SPDC source in the 2 um band.