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arXiv · 1305.3964

Powerful terahertz emission from Bi2Sr2CaCu2O8+delta mesa arrays

T. M. Benseman·K. E. Gray·A. E. Koshelev·W. -K. Kwok·U. Welp·H. Minami·K. Kadowaki·T. Yamamoto
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Abstract

Stacks of intrinsic Josephson junctions (IJJs) in high-temperature superconductors enable the fabrication of compact sources of coherent terahertz radiation. Here we demonstrate that multiple stacks patterned on the same Bi2Sr2CaCu2O8+delta crystal can - under optimized conditions - be synchronized to emit high-power THz-radiation. For three synchronized stacks we achieved 610 microwatts of continuous-wave coherent radiation power at 0.51 THz. We suggest that synchronization is promoted by THz-waves in the base crystal. We note though that synchronization cannot be achieved in all samples. However, even in these cases powers on the 100-microwatt scale can be generated.

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T. M. Benseman, K. E. Gray, A. E. Koshelev, W. -K. Kwok, U. Welp, H. Minami, K. Kadowaki, T. Yamamoto. 2013-05-17. Powerful terahertz emission from Bi2Sr2CaCu2O8+delta mesa arrays. https://doi.org/10.1063/1.4813536

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