Mutual Synchronization of Terahertz Emissions from Multiple Intrinsic Josephson Junction Mesas

Abstract

We present a direct proof of synchronized macroscopic Josephson oscillations excited in two intrinsic Josephson junction stacks formed on a Bi 2 Sr 2 CaCu $_{2} \mathrm{O}_{{8+} {\delta }}$ single crystal. The strong coupling between the Josephson oscillations in the two mesas via the base crystal is detected by polarization analysis of emitted terahertz waves from individually biased mesas and simultaneously biased mesas.