Microwave-Enhanced Proximity Effect in Superconductor-Normal-Metal-Superconductor Microjunctions

Abstract
Very large microwave enhancements of the critical current of small superconductor—normal-metal—superconductor junctions have been observed to temperatures as low as 0.2Tc of the superconductor. The experimental results indicate that this enhancement is due to a strengthening of the proximity effect at the center of the normal-metal layer by the time-varying field.