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Use of high Tc superconductors for far‐infrared Fabry–Perot resonators

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Renk, Karl Friedrich ; Betz, J. ; Schützmann, J. ; Prückl, A. ; Brunner, B. ; Lengfellner, Hans
Date of publication of this fulltext: 08 Dec 2010 07:29


In this letter we report on the application of high Tc superconductors for fabrication of far‐infrared Fabry–Perot resonators. Thin films of YBa2Cu3O7−δ deposited on MgO substrates by the laser ablation technique were used as reflectors. Two films on two different MgO plates were arranged parallel at a distance determining the lowest order resonance. We demonstrate operation of a resonator in a frequency range (up to about 300 cm−1) in which MgO is transparent at low temperature.

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