Physics – Condensed Matter – Superconductivity
Scientific paper
2010-07-05
Physics
Condensed Matter
Superconductivity
4 pages, 4 figures, accepted for publication in PRL
Scientific paper
10.1103/PhysRevLett.105.037005
Subterahertz radiation emitted from a variety of short rectangular-, square-, and disk-shaped mesas of intrinsic Josephson junctions fabricated from a Bi2Sr2CaCu2O8+d single crystal was studied from the observed I-V characteristics, far-infrared spectra, and spatial radiation patterns. In all cases, the radiation frequency satisfies the conditions both for the ac Josephson effect and for a mesa cavity resonance mode. The integer higher harmonics observed in all spectra imply that the ac Josephson effect plays the dominant role in the novel dual-source radiation mechanism.
Deguchi Kota
Kadowaki Kazuo
Kashiwagi Takanari
Klemm Richard A.
Minami Hidetoshi
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