▎ 摘　　要

We studied the superconducting proximity effect under photoexcitation by illuminating a superconductor/monolayer graphene/superconductor (SGS) Josephson junction with monochromatic light at a wavelength of 1.31 mu m. Although the critical current I-c can be controlled by the irradiation power P, its variation cannot be explained by modification of the carrier density, which has been reported for semiconductor- based Josephson junctions. The estimated electron temperature of graphene is proportional to P-delta, where delta similar or equal to 1/3. This relation clearly indicates that photogenerated non-equilibrium carrier dynamics are responsible for the variation of Ic with P. We suggest that the SGS junction can directly mediate interactions between the optical field and the superconducting state. (C) 2016 AIP Publishing LLC.