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Título:
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Design and fabrication of coplanar YBCO structures on lithium niobate substrates
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Autor/a:
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Rozan, Edouard; Collado Gómez, Juan Carlos; García, A.; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fàbrega i Soler, Lluís; Rius Casals, Juan Manuel; Rubí, R.; Fontcuberta, Josep; Harackiewicz, F.
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RF&MW - Grup de Recerca de sistemes, dispositius i materials de RF i microones |
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Abstract:
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YBa2Cu3O7-δ (YBCO) with low RF losses has been successfully deposited onto lithium niobate (LNO) to improve the performance of electrooptic Mach-Zender modulators. Epitaxial, c-axis oriented superconducting YBCO thin films have been grown on X-cut LNO single crystals with a yttria-stabilized zirconia (YSZ) buffer layer by RF magnetron sputtering. This buffer layer is needed to obtain good superconducting properties of the YBCO grown. Numerical tools have been developed to analyze CPW structures based on YBCO/YSZ/LNO trilayers, and they indicate that YSZ thickness has to be kept to the minimum necessary for good YBCO growth. With this restriction, the RF losses of YBCO/YSZ/LNO samples have been measured. The results from these measurements are used to quantify the performance enhancement in a Mach-Zender modulator using YBCO electrodes. |
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Abstract:
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Peer Reviewed |
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Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Circuits de microones, radiofreqüència i ones mil·limètriques
-Superconductive devices
-Lithium niobate
-Yttrium
-Superconductivity
-barium compounds
-coplanar waveguides
-electro-optical modulation
-high-temperature superconductors
-lithium compounds
-sputtered coatings
-superconducting epitaxial layers
-superconducting microwave devices
-yttrium compounds
-RF loss
-RF magnetron sputtering
-YBCO/YSZ/LNO trilayer
-YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// coplanar waveguide
-YBa/sub 2/Cu/sub 3/O/sub 7/-ZrO/sub 2/Y/sub 2/O/sub 3/-LiNbO/sub 3/
-electro-optic Mach-Zehnder modulator
-lithium niobate substrate
-superconducting epitaxial thin film
-yttria stabilized zirconia buffer layer
-Itri
-Liti
-Circuits de microones
-Superconductors a altes temperatures |
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Derechos:
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Tipo de documento:
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Artículo |
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Editor:
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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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