THz emission from a Bi2Sr2CaCu2O8+{\delta} cross-whisker junction

TL;DR

This study demonstrates THz emission at approximately 0.7 THz from a cross-whisker junction of BSCCO, highlighting a practical approach to using cuprate superconductors as compact THz sources.

Contribution

First demonstration of THz emission from a BSCCO cross-whisker junction, expanding potential applications of superconducting THz emitters.

Findings

Successful THz emission observed at ~0.7 THz

Used easily obtainable whisker crystals instead of single crystals

Potential for broader application of BSCCO in THz technology

Abstract

Cuprate superconductor Bi2Sr2CaCu2O8+{\delta} (BSCCO) has been a promising candidate of a coherent, continuous, and compact THz light source owing to its intrinsic Josephson junction inside the crystal structure. In this paper, we utilized BSCCO cross-whisker junctions to produce THz emitter device using the whisker crystals which can be easily obtained compared with single crystals. As a result, we have successfully observed the emission from the cross-whisker intrinsic Josephson junction, with frequency of ~0.7 THz. Our findings might enlarge the applicability of BSCCO superconductors for the THz emission source.