Applied Sciences (Mar 2023)

Compact High-<i>T</i><sub>c</sub> Superconducting Terahertz Emitter with Tunable Frequency from 0.15 to 1 THz

  • Hancong Sun,
  • Shixian Chen,
  • Yong-Lei Wang,
  • Guozhu Sun,
  • Jian Chen,
  • Takeshi Hatano,
  • Valery P. Koshelets,
  • Dieter Koelle,
  • Reinhold Kleiner,
  • Huabing Wang,
  • Peiheng Wu

DOI
https://doi.org/10.3390/app13063469
Journal volume & issue
Vol. 13, no. 6
p. 3469

Abstract

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A compact cryogenic terahertz emitter is highly desired for applications in terahertz astronomy with a broad frequency range of emissions and relatively high emission power. In this paper, we report on a terahertz emitter based on Bi2Sr2CaCu2O8 + δ (BSCCO) intrinsic Josephson junctions, with a frequency range from 0.15 to 1.01 THz. The emitter is a square gold-BSCCO-gold mesa on a sapphire substrate fabricated by a simple and efficient method. The highest emission power of 5.62 μW at 0.35 THz was observed at 50 K. A record low emission frequency of 0.15 THz was achieved at 85 K, extending the applicability of BSCCO terahertz emitters in the low-frequency range.

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