2015 CAP Congress / Congrès de l'ACP 2015

Superfluid 4He Helmoltz nanoresonator

18 Jun 2015, 16:15

15m

NINT Taylor room (University of Alberta)

Oral (Non-Student) / orale (non-étudiant) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) R3-1 Light-Matter Interactions (DAMOPC-DCMMP) / Interactions entre la lumière et la matière (DPAMPC-DPMCM)

Speaker

Fabien Souris (University of Alberta)

Description

We have built and investigated the properties of a nanofluidic Helmoltz resonator operating with superfluid ${}^4$He. The density oscillations of the fluid are measured with an on-chip capacitor, allowing us to probe a small volume of helium contained in the resonator. Oscillators based on superfluid ${}^4$He are expected to reach high quality factors due to its high purity and dissipationless flow. We have identified and studied the several dissipation mechanisms responsible for the limitation of the Q-factor in our device. Different improvements are proposed to reach higher Q-factors.