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Bulletin of the American Physical Society

Electromagnetic wave generation by mesoscopic intrinsic Josephson junctions of single crystal $\mathrm{Bi_2Sr_2CaCu_2O_{8+\delta}}$

Kazuo Kadowaki, Takuya Yamazaki, Itsuhiro Kakeya, Takashi Yamamoto

Published Mar 14, 2006• 0 citations
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Electromagnetic wave generation by mesoscopic intrinsic Josephson junctions of single crystal Bi2Sr2CaCu2O8+δ\mathrm{Bi_2Sr_2CaCu_2O_{8+\delta}}Bi2​Sr2​CaCu2​O8+δ​
Single crystals of layered high-temperature superconductors intrinsically behave as stacks of Josephson junctions. We analyze response of current-biased stack of intrinsic junctions to irradiation by the external electromagnetic (em) wave. In addition to well-known Shapiro steps in the current-voltage characteristics, irradiation promotes stimulated radiation which adds with spontaneous Josephson radiation from the crystal. Such enhancement of radiation from current-biased crystal may be used for amplification of em waves. Irradiation also facilitates synchronization of Josephson oscillations in all intrinsic Josephson junctions of a single crystal as well as oscillations in intrinsic junctions of different crystals.