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Direct optical observations of surface thermal motions at sub-shot noise levels

Takahisa Mitsui and Kenichiro Aoki

  • Hiyoshi Department of Physics and Research and Education Center for Natural Sciences, Keio University, Yokohama 223-8521, Japan

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Phys. Rev. E 80, 020602(R) – Published 19 August, 2009

DOI: https://doi.org/10.1103/PhysRevE.80.020602

Abstract

We measure surface thermal fluctuation spectra of liquids, solids, complex fluids, and biological matter using reflected light measurements down to ∼10−17 rad2/Hz in inclinations or ∼10−29 m2/Hz in vertical displacement. The random thermal fluctuations are delineated from random noise at sub-shot noise levels. The principle of the measurement is not limited to surface measurements. The dynamical evolution of the surface properties is also investigated. The measurement time is short, passive, and applicable to a wide variety of surfaces.

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Outline

Information

Phys. Rev. E 80, 020602(R)– Published 19 August, 2009
  • Received 29 January 2009

© 2009 American Physical Society

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