Tunable terahertz emission from Bi2Sr2CaCu2O8+\delta\ mesa devices

T. M. Benseman; A. E. Koshelev; K. E. Gray; W. -K. Kwok; U. Welp; K. Kadowaki; M. Tachiki; T. Yamamoto

doi:10.1103/PhysRevB.84.064523

Tunable terahertz emission from Bi2Sr2CaCu2O8+\delta\ mesa devices

Superconductivity 2015-05-30 v1

Authors: T. M. Benseman , A. E. Koshelev , K. E. Gray , W. -K. Kwok , U. Welp , K. Kadowaki , M. Tachiki , T. Yamamoto

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Abstract

We have measured coherent terahertz emission spectra from Bi2Sr2CaCu2O8+\delta\ mesa devices, as a function of temperature and mesa bias voltage. The emission frequency is found to be tunable by up to 12% by varying the temperature and bias voltage. We attribute the appearance of tunability to asymmetric boundaries at the top and bottom, and the non-rectangular cross-section of the mesas. This interpretation is consistent with numerical simulations of the dynamics of intrinsic Josephson junctions in the mesa. Easily tunable emission frequency may have important implications for the design of terahertz devices based on stacked intrinsic Josephson junctions.

Keywords

terahertz emission Bi2Sr2CaCu2O8+δ mesa devices intrinsic Josephson junctions tunable frequency

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@article{arxiv.1108.0143,
  title  = {Tunable terahertz emission from Bi2Sr2CaCu2O8+\delta\ mesa devices},
  author = {T. M. Benseman and A. E. Koshelev and K. E. Gray and W. -K. Kwok and U. Welp and K. Kadowaki and M. Tachiki and T. Yamamoto},
  journal= {arXiv preprint arXiv:1108.0143},
  year   = {2015}
}

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24 pages, 6 figures

Tunable terahertz emission from Bi2Sr2CaCu2O8+\delta\ mesa devices

Abstract

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