Amplitude and Phase of Tightly Focused Laser Beams in Turbid Media

Carole K. Hayakawa, Vasan Venugopalan, Vishnu V. Krishnamachari, and Eric O. Potma
Phys. Rev. Lett. 103, 043903 – Published 23 July 2009

Abstract

A framework is developed that combines electric field Monte Carlo simulations of random scattering with an angular-spectrum representation of diffraction theory to determine the amplitude and phase characteristics of tightly focused laser beams in turbid media. For planar sample geometries, the scattering-induced coherence loss of wave vectors at larger angles is shown to be the primary mechanism for broadening the focal volume. This approach for evaluating the formation of the focal volume in turbid media is of direct relevance to the imaging properties of nonlinear coherent microscopy, which rely on both the amplitude and phase of the focused fields.

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  • Received 13 January 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.043903

©2009 American Physical Society

Authors & Affiliations

Carole K. Hayakawa and Vasan Venugopalan*

  • Department of Chemical Engineering and Materials Science, Engineering Tower, University of California, Irvine, California 92697, USA

Vishnu V. Krishnamachari and Eric O. Potma

  • Department of Chemistry, Natural Sciences II, University of California, Irvine, California 92697, USA

  • *vvenugop@uci.edu
  • epotma@uci.edu

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Issue

Vol. 103, Iss. 4 — 24 July 2009

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