Controlling the opto-mechanics of a cantilever in an interferometer via cavity loss

Journal Article · Mon Sep 21 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4931702· OSTI ID:22482146

Schmidsfeld, A. von, E-mail: [e-mail]; Reichling, M., E-mail: [e-mail] ^[1]

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1. Fachbereich Physik, Universität Osnabrück, Barbarastraße 7, 49076 Osnabrück (Germany)

In a non-contact atomic force microscope, based on interferometric cantilever displacement detection, the optical return loss of the system is tunable via the distance between the fiber end and the cantilever. We utilize this for tuning the interferometer from a predominant Michelson to a predominant Fabry-Pérot characteristics and introduce the Fabry-Pérot enhancement factor as a quantitative measure for multibeam interference in the cavity. This experimentally easily accessible and adjustable parameter provides a control of the opto-mechanical interaction between the cavity light field and the cantilever. The quantitative assessment of the light pressure acting on the cantilever oscillating in the cavity via the frequency shift allows an in-situ measurement of the cantilever stiffness with remarkable precision.

• OSTI ID: 22482146
• Journal Information: Applied Physics Letters, Vol. 107, Issue 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
ATOMIC FORCE MICROSCOPY
CONTROL
DETECTION
DISTANCE
FIBERS
FLEXIBILITY
INTERFERENCE
INTERFEROMETERS
LOSSES
MECHANICS
TUNING