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MM: Fachverband Metall- und Materialphysik
MM 27: Transport: Nanomechanics (joint session with MM)
MM 27.1: Vortrag
Dienstag, 17. März 2015, 14:00–14:15, A 053
Inductively coupled cavity optomechanics — •P. Schmidt1,2, M. Pernpeintner1,2,3, K.F. Wulschner1,2, S.T.B. Goennenwein1,3, A. Marx1, R. Gross1,2,3, and H. Huebl1,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Nanosystems Initiative Munich, München, Germany
Cavity optomechanics allows to study the light-matter interaction with micro-, meso-, and macroscopic objects offering the possibility to access the quantum mechanical regime in the literal sense [1].
Transferring this approach to the microwave (MW) domain gives rise to the field of cavity electromechanics. Typical electromechanical systems consist of a micro- or nanomechanical resonator coupled capacitively to a superconducting MW resonator.
Here, we present the approach of an inductively coupled electromechanical system. To this end, we implement a dc-SQUID with a vibrational element at the current antinode of a λ/4 MW resonator. Hereby, the eigenfrequency of the MW resonator becomes tunable. As the vibration of the nano-string changes the SQUID loop area, we expect that the electromechanical coupling becomes flux-tunable.
We present first experimental results obtained from MW transmission spectroscopy in a dilution refrigerator and compare it with our theoretical model. These results indicate an expected tunability of the electromechanical coupling from 0 to 1 kHz.
[1] M. Aspelmeyer et al., Physics Today 65, 29 (2012).