Graphene-Insulator-Superconductor junctions as thermoelectric bolometers

Leonardo Lucchesi; Federico Paolucci

Paper

Graphene-Insulator-Superconductor junctions as thermoelectric bolometers

Abstract

We design a superconducting thermoelectric bolometer made of a Graphene-Insulator-Superconductor tunnel junction. Our detector has the advantage of being passive, as it directly transduces input power to a voltage without the need to modulate an external bias. We characterize the device via numerical simulation of the full nonlinear thermal dynamical model of the junction, considering heating of both sides of the junction. While estimating noise contributions, we found novel expressions due to the temperatures of both sides being different than the bath temperature. Numerical simulations show a Noise Equivalent Power

for an input power of

, a response time of

and an integration time to obtain a Signal-to-Noise Ratio

for an input power

. Therefore, the device shows promise for large-array cosmological experiment applications, also considering its advantages for fabrication and heat budget.