Abstract

We report on depolarization measurements of femtosecond pulses retroreflected from dense suspensions of silica microspheres with solid loads increasing from 5% to 54%. Backscattered pulse shapes compare well with predictions of the diffusion theory for all volume fractions, and the inferred values of the transport mean free path agree with independent measurements of enhanced backscattering. The measured degree of polarization decays exponentially with temporal rates that scale with the solid load. It is newly found that, for all solid loads, depolarization sets in for path lengths longer than approximately five transport mean free paths.

© 1997 Optical Society of America

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    [CrossRef]
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    [CrossRef]
  6. C. Brosseau, Appl. Opt. 34, 4788 (1995).
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    [CrossRef] [PubMed]
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1996 (2)

1995 (5)

1994 (2)

D. Bicout, C. Brosseau, A. S. Martinez, and J. M. Schmitt, Phys. Rev. E 49, 1767 (1994).
[CrossRef]

C. Brosseau and D. Bicout, Phys. Rev. E 50, 4997 (1994).
[CrossRef]

1991 (1)

1989 (1)

P. Vreeker, M. P. van Albada, R. Sprik, and A. Lagendijk, Opt. Commun. 70, 365 (1989).
[CrossRef]

1988 (1)

E. Akkermans, P. E. Wolf, R. Maynard, and G. Maret, J. Phys. (Paris) 49, 77 (1988).
[CrossRef]

Akkermans, E.

E. Akkermans, P. E. Wolf, R. Maynard, and G. Maret, J. Phys. (Paris) 49, 77 (1988).
[CrossRef]

Asakura, T.

M. Dogariu and T. Asakura, Opt. Eng. 35, 2234 (1996).
[CrossRef]

Barry, N. P.

Berkai, E.

Bicout, D.

C. Brosseau and D. Bicout, Phys. Rev. E 50, 4997 (1994).
[CrossRef]

D. Bicout, C. Brosseau, A. S. Martinez, and J. M. Schmitt, Phys. Rev. E 49, 1767 (1994).
[CrossRef]

Boreman, G.

Brosseau, C.

C. Brosseau, Appl. Opt. 34, 4788 (1995).
[CrossRef] [PubMed]

C. Brosseau, Opt. Lett. 20, 1221 (1995).
[CrossRef] [PubMed]

D. Bicout, C. Brosseau, A. S. Martinez, and J. M. Schmitt, Phys. Rev. E 49, 1767 (1994).
[CrossRef]

C. Brosseau and D. Bicout, Phys. Rev. E 50, 4997 (1994).
[CrossRef]

Bruce, N. C.

Cho, Y.

Dainty, J. C.

Dogariu, A.

Dogariu, M.

French, P. M. W.

Freund, I.

Hashimoto, K.

Horinaka, H.

Hyde, S. C. W.

Lagendijk, A.

P. Vreeker, M. P. van Albada, R. Sprik, and A. Lagendijk, Opt. Commun. 70, 365 (1989).
[CrossRef]

Maret, G.

E. Akkermans, P. E. Wolf, R. Maynard, and G. Maret, J. Phys. (Paris) 49, 77 (1988).
[CrossRef]

Martinez, A. S.

D. Bicout, C. Brosseau, A. S. Martinez, and J. M. Schmitt, Phys. Rev. E 49, 1767 (1994).
[CrossRef]

A. S. Martinez and R. Maynard, in Localization and Propagation of Classical Waves in Random and Periodic Structures, C. M. Soukoulis, ed. (Plenum, New York, 1994).

Maynard, R.

E. Akkermans, P. E. Wolf, R. Maynard, and G. Maret, J. Phys. (Paris) 49, 77 (1988).
[CrossRef]

A. S. Martinez and R. Maynard, in Localization and Propagation of Classical Waves in Random and Periodic Structures, C. M. Soukoulis, ed. (Plenum, New York, 1994).

Schmidt, F. E.

Schmitt, J. M.

D. Bicout, C. Brosseau, A. S. Martinez, and J. M. Schmitt, Phys. Rev. E 49, 1767 (1994).
[CrossRef]

Sprik, R.

P. Vreeker, M. P. van Albada, R. Sprik, and A. Lagendijk, Opt. Commun. 70, 365 (1989).
[CrossRef]

van Albada, M. P.

P. Vreeker, M. P. van Albada, R. Sprik, and A. Lagendijk, Opt. Commun. 70, 365 (1989).
[CrossRef]

Vreeker, P.

P. Vreeker, M. P. van Albada, R. Sprik, and A. Lagendijk, Opt. Commun. 70, 365 (1989).
[CrossRef]

Wada, K.

Wolf, P. E.

E. Akkermans, P. E. Wolf, R. Maynard, and G. Maret, J. Phys. (Paris) 49, 77 (1988).
[CrossRef]

Ziman, J. M.

J. M. Ziman, Models of Disorder (Cambridge U. Press, London, 1979).

Appl. Opt. (2)

J. Opt. Soc. Am. A (1)

J. Phys. (Paris) (1)

E. Akkermans, P. E. Wolf, R. Maynard, and G. Maret, J. Phys. (Paris) 49, 77 (1988).
[CrossRef]

Opt. Commun. (1)

P. Vreeker, M. P. van Albada, R. Sprik, and A. Lagendijk, Opt. Commun. 70, 365 (1989).
[CrossRef]

Opt. Eng. (1)

M. Dogariu and T. Asakura, Opt. Eng. 35, 2234 (1996).
[CrossRef]

Opt. Lett. (4)

Phys. Rev. E (2)

D. Bicout, C. Brosseau, A. S. Martinez, and J. M. Schmitt, Phys. Rev. E 49, 1767 (1994).
[CrossRef]

C. Brosseau and D. Bicout, Phys. Rev. E 50, 4997 (1994).
[CrossRef]

Other (2)

A. S. Martinez and R. Maynard, in Localization and Propagation of Classical Waves in Random and Periodic Structures, C. M. Soukoulis, ed. (Plenum, New York, 1994).

J. M. Ziman, Models of Disorder (Cambridge U. Press, London, 1979).

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Figures (4)

Fig. 1
Fig. 1

Experimental setup for measuring the temporal profiles of backscattered light pulses. SHG, second-harmonic-generating; BS's, beam splitters.

Fig. 2
Fig. 2

Backscattered light pulses from dispersions of 1-µm-diameter silica particles with volume fractions of 5% and 25%. The inset shows the temporal evolution of the degree of polarization.

Fig. 3
Fig. 3

Values of the transport mean free path corresponding to different volume fractions of 1-µm-diameter silica particles as inferred from enhanced backscattering (EBS) measurements and time-resolved measurements and estimated from Mie theory corrected for interparticle correlations.

Fig. 4
Fig. 4

Depolarization time constants corresponding to dispersions of 1-µm–diameter silica particles with different volume fractions. The inset shows the number of transport mean free paths needed for backscattered photons to become depolarized, as evaluated from the time constant of the depolarization process. Also shown is the theoretical prediction for Rayleigh scatterers.10

Equations (5)

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I, n=Inf, n,
fn=131015n-1-715n-1
fn=131015n-1+2715n-1
Pn=In-InIn+In,
Pnexp-n/κ,

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