Nonlinear vs. bolometric radiation response and phonon thermal conductance in graphene-superconductor junctions

摘要: Graphene is a promising candidate for building fast and ultra-sensitive bolometric detectors due to its weak electron-phonon coupling low heat capacity. In order realize practical graphene-based bolometer, several important issues, including the nature of radiation response, efficiency thermal conductance need be carefully studied. Addressing these we present graphene-superconductor junctions as viable option achieve efficient sensitive bolometers, with superconductor contacts serving hot electron barriers. For device highly transparent interfaces, resistance readout in presence radio frequency dominated by non-linear response. On other hand, tunnel shows dominantly response radiation. graphene devices fabricated on $SiO_{2}$ substrates, confirm recent theoretical predictions $T^{2}$ temperature dependence phonon disorder channel at temperatures.