• Open Access

Reconstructing Nonlinearities with Intermodulation Spectroscopy

Carsten Hutter, Daniel Platz, E. A. Tholén, T. H. Hansson, and D. B. Haviland
Phys. Rev. Lett. 104, 050801 – Published 5 February 2010

Abstract

We describe a method of analysis which allows for reconstructing the nonlinear disturbance of a high Q harmonic oscillator. When the oscillator is driven with two or more frequencies, the nonlinearity causes intermodulation of the drives, resulting in a complicated spectral response. Analysis of this spectrum allows one to approximate the nonlinearity. The method, which is generally applicable to measurements based on resonant detection, increases the information content of the measurement without requiring a large detection bandwidth, and optimally uses the enhanced sensitivity near resonance to extract information and minimize error due to detector noise.

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  • Received 15 November 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.050801

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Authors & Affiliations

Carsten Hutter1,2, Daniel Platz2, E. A. Tholén2, T. H. Hansson1, and D. B. Haviland2

  • 1Department of Physics, Stockholm University, AlbaNova, SE–106 91 Stockholm, Sweden
  • 2Nanostructure Physics, Royal Institute of Technology (KTH), AlbaNova, SE-106 91 Stockholm, Sweden

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Vol. 104, Iss. 5 — 5 February 2010

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