Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 54: Posters: Quantum Optics and Photonics IV

Q 54.31: Poster

Donnerstag, 12. März 2020, 16:30–18:30, Empore Lichthof

Design of a cryogenic Low Noise Amplifier — •Roland Jaha1,2,3, Manuel Delgado-Restituto4,5, Jorge Fernández-Berni4,5, Ricardo Carmona Galán4,5, Matthias Häussler1,2,3, Martin A. Wolff1,2,3, and Carsten Schuck1,2,31Physics Institute, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany — 2CeNTech - Center for NanoTechnology, Heisenbergstr. 11, 48149 Münster, Germany — 3SoN - Center for Soft Nanoscience, Busso-Peus-Str. 10, 48149 Münster, Germany — 4University of Seville, C/S. Fernando 4, 41004 Seville, Spain — 5Instituto de Microelectrónica IMSE-CNM, Cl Américo Vespucio 28, 41092 Seville, Spain

Microwave low noise amplifiers (LNAs) are essential signal processing components of a very large number of scientific systems that are naturally concerned with low temperature environments. However, state-of-the-art LNAs are typically operated at room temperature and suffer from high noise temperatures in the radio frequency (RF) range. Here we show how significantly reduced noise temperatures below 15 K can be achieved with cryogenic LNAs. We exploit the high carrier mobility and low loss of silicon-germanium heterojunction bipolar transistors at cryogenic temperatures and optimize amplifier designs for RF signals originating from superconducting nanowire single photon detectors. We achieve LNA designs providing >4 GHz bandwidth signal amplification with up to 45 dB gain, dissipating only 5 mW of power. Our results will allow for significantly enhanced small-signal processing at cryogenic temperatures with minimal impact on the thermal budget.

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