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Acousto-optic modulation of a point-scatterer array.

Joseph S Paul1, Wai Chong Fu

  • 1Graduate School of Biomedical Engineering, University of New South Wales, Sydney, NSW 2052, Australia. paul@unsw.edu.au

Optics Letters
|April 6, 2010
PubMed
Summary
This summary is machine-generated.

Acoustic modulation of light scattering was analyzed. Researchers found the optoelastic effect and array element translation contribute to the acousto-optic signal, which varies sinusoidally with acoustic frequency.

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Area of Science:

  • * Physics
  • * Optics
  • * Acoustics

Background:

  • * Light scattering from arrays can be modulated by acoustic waves.
  • * The optoelastic (OE) effect and acoustically induced translation are potential contributing factors.
  • * Understanding these contributions is crucial for acousto-optic (AO) device applications.

Purpose of the Study:

  • * To analyze the far-field light scattering modulation from a linear centrosymmetric array.
  • * To investigate the contributions of the optoelastic effect and acoustically induced translation.
  • * To determine the relationship between these effects and the resulting acousto-optic signal.

Main Methods:

  • * Theoretical analysis of far-field light scattering.
  • * Consideration of optoelastic effects on the array.
  • * Modeling of acoustically induced translation of array elements.

Main Results:

  • * Modulated light intensity exhibits sinusoidal variation at the acoustic frequency within physical limits.
  • * The OE and translation components of the acousto-optic signal are in phase quadrature.
  • * Both components show double-sided maxima as a function of detector angle.

Conclusions:

  • * Acoustic modulation of light scattering is influenced by both OE effect and element translation.
  • * The acousto-optic signal's characteristics are dependent on the interplay of these physical phenomena.
  • * This study provides insights into the fundamental mechanisms governing acoustic modulation of light in such arrays.