COUTURIER, Gérard; NONY, Laurent; BOISGARD, Rodolphe; AIMÉ, Jean-Pierre

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COUTURIER, Gérard
Centre de physique moléculaire optique et hertzienne [CPMOH]

NONY, Laurent
Laboratoire matériaux et microélectronique de Provence [L2MP]

BOISGARD, Rodolphe
Centre de physique moléculaire optique et hertzienne [CPMOH]

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Article de revue

Ce document a été publié dans

Applied Physics. 2002, vol. 91 (4), p. 2537-2543

Springer-Verlag

Résumé en anglais

This paper is a theoretical and a numerical investigation of the stability of a tip-cantilever system used in Non-Contact Atomic Force Microscopy (NC-AFM) when it oscillates close to a surface. No additional dissipative force is considered. The theoretical approach is based on a variationnal method exploiting a coarse grained operation that gives the temporal dependence of the nonlinear coupled equations of motion in amplitude and phase of the oscillator. Stability criterions for the resonance peak are deduced and predict a stable behavior of the oscillator in the vicinity of the resonance. The numerical approach is based on results obtained with a virtual NC-AFM developped in our group. The effect of the size of the stable domain in phase is investigated. These results are in particularly good agreement with the theoretical predictions. Also they show the influence of the phase shifter in the feedback loop and the way it can affect the damping signal.< Réduire

Mots clés en anglais

NC-AFM

Stability

Virtual machine

Damping variations

Variational principle

Phase shifter

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798