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Driving a Nanomechanical Resonator with a Phonon Wind in Superfluid 4He

Activity: Talk or presentation typesInvited talk


We use nanomechanical resonators of an extremely high-quality factor to probe superfluid 4 He at mK temperatures. The high sensitivity of these devices to thermal excitations in the environment makes it possible to drive them through the resonant momentum transfer of phonons generated by the nearby heater. This so-called "phonon wind" is a reverse thermomechanical effect that until now has never been demonstrated.

External organisation (Research grants)

NameLow Temperature Laboratory, Department of Applied Physics, Aalto University School of Science, P.O. Box 13500, 00076 AALTO