Design and fabrication of coplanar YBCO structures on lithium niobate substrates
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Rights accessOpen Access
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.
CitationRozan, E; Collado, C; O'Callaghan, J.M.; Pous, R; Fabrega, L; Rius, J; Rubí, R; Fontcuberta, J; Harackiewicz, F. Design and fabrication of coplanar YBCO structures on lithium niobate substrates. IEEE Transactions on applied superconductivity, 1999, vol. 9, núm. 2, p.2866-2869
Showing items related by title, author, creator and subject.
Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-05-31)
Open AccessThis paper reports on a numerical technique to obtain the current distribution in the annular bent sections of planar layouts. This is used to obtain the linear and nonlinear circuit distributed parameters modeling a ...
Nguyen, T. D.; O'Callaghan Castellà, Juan Manuel; Davidson, B. A.; Redwing, R. D.; Hohenwarter, G. K. G.; Nordman, J. E.; Beyer, J. B. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1995-01-31)
Open AccessWe have investigated possible mechanisms for conduction in high-T/sub c/ thin-film microbridges biased into the voltage state via the low-frequency noise properties. Measurements on thinned YBCO microbridges indicate that ...
Barra Bizinotto, Marilda; O'Callaghan Castellà, Juan Manuel; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-09-30)
Open AccessThis work presents novel compact high-temperature superconductor microstrip resonators and filters based on the Hilbert space-filling fractal curve. Several Hilbert resonator configurations have been assessed by using a ...