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Science 23 November 2007:
Vol. 318. no. 5854, pp. 1254 - 1255
DOI: 10.1126/science.1151373
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Perspectives

APPLIED PHYSICS:
Filling the Terahertz Gap

Reinhold Kleiner

A device made from a layered superconductor emits electromagnetic waves in a frequency range for which good radiation sources had been lacking.

The author is at the Physikalisches Institut, Universität Tübingen, D-72076 Tübingen, Germany. E-mail: kleiner{at}uni-tuebingen.de

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Science. ISSN 0036-8075 (print), 1095-9203 (online)