Spin mediated Photomechanical Coupling of a Nanoelectromechanical Shuttle.
We show that nanomechanical vibrations in a magnetic shuttle device can be strongly affected by external microwave irradiation through photo assisted electronic spin flip transitions. Mechanical consequences of these spin flips are due to a spin dependent magnetic force, which may lead to a nanomechanical instability in the device. We derive a criterion for the instability to occur and analyze different regimes of nanomechanical oscillations. Possible experimental realizations of the spin mediated photomechanical instability and detection of the device backaction are discussed.
Physical review letters