Physics – Condensed Matter – Superconductivity
Scientific paper
2012-01-07
Physics
Condensed Matter
Superconductivity
4 pages, 4 figures, accepted for publication in PRL
Scientific paper
10.1103/PhysRevLett.108.107006
Continuous, coherent sub-terahertz radiation arises when a dc voltage is applied across a stack of the many intrinsic Josephson junctions in a Bi2Sr2CaCu2O8+d single crystal. The active junctions produce an equal number of I-V characteristic branches. Each branch radiates at a slightly tunable frequency obeying the ac Josephson relation. The overall output is broadly tunable and nearly independent of heating effects and internal cavity frequencies. Amplification by a surrounding external cavity to allow for the development of a useful high-power source is proposed.
Delfanazari Kaveh
Kadowaki Kazuo
Kashiwagi Takanari
Kitamura Takeo
Klemm Richard A.
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