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Pré-Publication, Document De Travail Année : 2008

Optical cavity back action on an AFM microlever

Guillaume Jourdan
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  • PersonId : 842647
Fabio Comin
  • Fonction : Auteur
  • PersonId : 834626
Joël Chevrier
CP

Résumé

Two back action processes generated by an optical cavity based detection device can deeply transform the dynamical behavior of an AFM microlever: the photothermal force or the radiation pressure. Whereas noise damping or amplifying depends only on the detuning inside the cavity for radiation pressure back action, we present experimental results carried out under vacuum and at room temperature on the photothermal back action process which appears to be much more complex. We show for the first time that it can simultaneously act on two vibration modes in opposite direction: noise on one mode is amplified whereas it is damped on another mode. Modelisation of this effect leads us to conclude that indeed it is specific to photothermal back action and cannot be observed in case of radiation pressure back action.
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Dates et versions

hal-00257633 , version 1 (20-02-2008)
hal-00257633 , version 2 (29-09-2008)

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Guillaume Jourdan, Fabio Comin, Joël Chevrier. Optical cavity back action on an AFM microlever. 2008. ⟨hal-00257633v1⟩

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