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We numerically implement the concept of thermal radiation pumps in realisticphotonic circuits and demonstrate their efficiency to control the radiationcurrent, emitted between two reservoirs with equal temperature. The proposedpumping scheme involves a cyclic adiabatic modulation of two parameters thatcontrol the spectral characteristics of the photonic circuit. We show that theresulting pumping cycle exhibits maximum radiation current when a cyclicmodulation of the system is properly engineered to be in the proximity of aresonance degeneracy in the parameter space of the photonic circuit. Adeveloped Floquet scattering framework, which in the adiabatic limit boils downto the analysis of an instantaneous scattering matrix, is offering anengineering tool for designing and predicting the performance of such thermalpumps. Our predictions are confirmed by time-domain simulations invoking anadiabatically driven photonic cavity.

Implementation of Optimal Thermal Radiation Pumps using Adiabatically Modulated Photonic Cavities