Mutually Synchronized Macroscopic Josephson Oscillations Demonstrated by Polarization Analysis of Superconducting Terahertz Emitters
Manabu Tsujimoto, Suwako Fujita, Genki Kuwano, Kei‐ichiro Maeda, Asem Elarabi, J. Hawecker, J. Tignon, J. Mangeney, Sukhdeep Dhillon, Itsuhiro Kakeya
Abstract
Despite its potential for $e.g.$ medical imaging, wireless communication, and ultrasensitive analysis of biological materials, the terahertz frequency range of light cannot be suitably utilized without practical solid-state sources. A naturally formed stack of superconducting junctions emits terahertz radiation, owing to synchronization of macroscopic wave functions, and the authors propose a means to manipulate that synchronization, which is the most promising way to attain a versatile superconducting terahertz source. Their findings also give insight into the quantum physics of entangled photons emitted from superconductors.