Compact Superconducting Terahertz Source Operating in Liquid Nitrogen

L. Y. Hao; M. Ji; J. Yuan; D. Y. An; M. Y. Li; X. J. Zhou; Y. Huang; H. C. Sun; Q. Zhu; F. Rudau; R. Wieland; N. Kinev; J. Li; W. W. Xu; B. B. Jin; J. Chen; T. Hatano; V. P. Koshelets; D. Koelle; R. Kleiner; H. B. Wang; P. H. Wu

doi:10.1103/PhysRevApplied.3.024006

Compact Superconducting Terahertz Source Operating in Liquid Nitrogen

L. Y. Hao, M. Ji, J. Yuan, D. Y. An, M. Y. Li, X. J. Zhou, Y. Huang, H. C. Sun, Q. Zhu, F. Rudau, R. Wieland, N. Kinev, J. Li, W. W. Xu, B. B. Jin, J. Chen, T. Hatano, V. P. Koshelets, D. Koelle, R. Kleiner, H. B. Wang, P. H. Wu

DOI 10.1103/PhysRevApplied.3.024006 · Physical Review Applied

T1

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Abstract

We report on a liquid-nitrogen-cooled compact source for continuous terahertz (THz) emission. The emitter is a Bi2Sr2CaCu2O8+δ intrinsic Josephson-junction stack embedded between two gold layers and sandwiched between two MgO substrates. The radiation is emitted to free space through a hollow metallic tube acting as a waveguide. The maximum emission power is 1.17 μW. The tunable emission frequency bandwidth is up to 100 GHz with a maximum emission power at 0.311 THz. Since the operation voltage is about 1 V and the current is less than 30 mA, we are able to drive this terahertz source at 77 K with only one commercial 1.5-V battery, just like a torch. This convenient and economical setup may find applications in fields like tracer-gas detection or nondestructive evaluation.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	88	Pressure not reported	unknown