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DOE OSTI · 1176293

Tunable, superconducting, surface-emitting teraherz source

Welp, Ulrich·Koshelev, Alexei E.·Gray, Kenneth E.·Kwok, Wai-Kwong·Vlasko-Vlasov, Vitalii
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Abstract

A compact, solid-state THz source based on the driven Josephson vortex lattice in a highly anisotropic superconductor such as Bi.sub.2Sr.sub.2CaCu.sub.2O.sub.8 that allows cw emission at tunable frequency. A second order metallic Bragg grating is used to achieve impedance matching and to induce surface emission of THz-radiation from a Bi.sub.2Sr.sub.2CaCu.sub.2O.sub.8 sample. Steering of the emitted THz beam is accomplished by tuning the Josephson vortex spacing around the grating period using a superimposed magnetic control field.

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36 MATERIALS SCIENCE75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

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Welp, Ulrich, Koshelev, Alexei E., Gray, Kenneth E., Kwok, Wai-Kwong, Vlasko-Vlasov, Vitalii. 2010-05-11. Tunable, superconducting, surface-emitting teraherz source. https://www.osti.gov/biblio/1176293

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