Junction (IMAGE) American Institute of Physics Caption Josephson junctions consist of a thin layer of insulator sandwiched between two superconducting layers. Researchers from Italy found that Josephson junctions placed in an oscillating magnetic field produced voltage pulses and that changing the shape of the Josephson junction changed the amount of power at different output frequencies. A ring-shaped junction produced more power at higher harmonics than did a circular or rectangular junction. Credit P. Solinas, et al. / <I>JAP</I> Usage Restrictions This image may only be used with appropriate caption and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.