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TT: Fachverband Tiefe Temperaturen

TT 32: Postersession Superconductivity: Josephson Junctions, SQUIDs, Heterostructures, Andreev Scattering, Vortex Physics, Cryodetectors, Measuring Devices, Cryotechnique

TT 32.27: Poster

Mittwoch, 25. März 2009, 14:00–18:00, P1A

Coupling between coplanar waveguide resonators for multi-pixel kinetic inductance detectors — •Gerd Hammer, Martin Herold, Stefan Wünsch, and Michael Siegel — Institut für Mikro- und Nanoelektronische Systeme, Universität Karlsruhe (TH), Karlsruhe, Deutschland

Coplanar resonators as core element of kinetic inductance detectors are suitable for large arrays in multi-pixel applications [1]. The readout of large arrays can be performed by simultaneous measurement of multiple channels using frequency domain multiplexing (FDM) [2]. We have studied the coupling of closely placed resonators for a multi-pixel design with a high packaging density. Superconducting resonators with niobium thin films on silicon substrates with different coupling to a transmission line have been designed, simulated and measured at liquid helium temperature. Results of the influence of coupling properties of closely placed resonators are presented and discussed in respect of a high packaging density.

[1] P. K. Day et al., Nature 425, 817 (2003).

[2] B. A. Mazin et al., Nucl. Instrum. Methods Phys. Res. A 558, 799 (2006).