Abstract

We report results of studies on the effect of different shapes and sizes of gold nanoparticles (GNPs) on the depolarization characteristics of Intralipid tissue phantoms. For a given extinction coefficient, the absorption characteristics of the GNPs contributed more to the depolarization of the turbid medium, and the contribution of scattering was significant only for the larger-sized particles. For rod-shaped GNPs, their depolarization plays an important role in the low scattering regime in which the depolarization properties of the nanoparticles (NPs) dominate in the turbid medium even if the contribution of the scattering from the NPs is about an order of magnitude less. For highly scattering samples, GNP absorption significantly modulates the depolarization spectra of the turbid medium.

© 2013 Optical Society of America

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2011 (1)

S. Grabtchak, T. J. Palmer, and W. M. Whelan, J. Biomed. Opt. 16, 077003 (2011).
[CrossRef]

2010 (2)

2008 (1)

2004 (1)

T. K. Sau and C. J. Murphy, Langmuir 20, 6414 (2004).
[CrossRef]

1996 (1)

1992 (1)

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Star, and J. van Gemert, Lasers Surg. Med. 12, 510 (1992).
[CrossRef]

1973 (1)

G. Frens, Nature Phys. Sci. 241, 20 (1973).
[CrossRef]

Aaron, J.

Adler, D. C.

Burt, J.

Chipman, R. A.

Cohen, D. W.

Connolly, J. L.

de la Rosa, E.

Flock, S. T.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Star, and J. van Gemert, Lasers Surg. Med. 12, 510 (1992).
[CrossRef]

Frens, G.

G. Frens, Nature Phys. Sci. 241, 20 (1973).
[CrossRef]

Fujimoto, J. G.

Ghosh, N.

J. Soni, H. Purwar, and N. Ghosh, Opt. Commun. 285, 1599 (2012).
[CrossRef]

Grabtchak, S.

S. Grabtchak, T. J. Palmer, and W. M. Whelan, J. Biomed. Opt. 16, 077003 (2011).
[CrossRef]

Gupta, P. K.

M. K. Swami, S. Manhas, H. S. Patel, and P. K. Gupta, Appl. Opt. 49, 3458 (2010).
[CrossRef]

M. K. Swami, H. S. Patel, A. Uppal, P. K. Kushwaha, and P. K. Gupta, in International Conference on Fibre Optics and Photonics, OSA Technical Digest (Optical Society of America, 2012), paper MPo.2.

Harrison, N.

Jacques, S. L.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Star, and J. van Gemert, Lasers Surg. Med. 12, 510 (1992).
[CrossRef]

José-Yacamán, M.

Kushwaha, P. K.

M. K. Swami, H. S. Patel, A. Uppal, P. K. Kushwaha, and P. K. Gupta, in International Conference on Fibre Optics and Photonics, OSA Technical Digest (Optical Society of America, 2012), paper MPo.2.

Lee, H.

Li, Y. L.

Lu, S. Y.

Manhas, S.

Mondelblatt, A.

Murphy, C. J.

T. K. Sau and C. J. Murphy, Langmuir 20, 6414 (2004).
[CrossRef]

Palmer, T. J.

S. Grabtchak, T. J. Palmer, and W. M. Whelan, J. Biomed. Opt. 16, 077003 (2011).
[CrossRef]

Patel, H. S.

M. K. Swami, S. Manhas, H. S. Patel, and P. K. Gupta, Appl. Opt. 49, 3458 (2010).
[CrossRef]

M. K. Swami, H. S. Patel, A. Uppal, P. K. Kushwaha, and P. K. Gupta, in International Conference on Fibre Optics and Photonics, OSA Technical Digest (Optical Society of America, 2012), paper MPo.2.

Purwar, H.

J. Soni, H. Purwar, and N. Ghosh, Opt. Commun. 285, 1599 (2012).
[CrossRef]

Robles, F. E.

Sau, T. K.

T. K. Sau and C. J. Murphy, Langmuir 20, 6414 (2004).
[CrossRef]

Seekell, K.

Sokolov, K.

Soni, J.

J. Soni, H. Purwar, and N. Ghosh, Opt. Commun. 285, 1599 (2012).
[CrossRef]

Star, W. M.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Star, and J. van Gemert, Lasers Surg. Med. 12, 510 (1992).
[CrossRef]

Swami, M. K.

M. K. Swami, S. Manhas, H. S. Patel, and P. K. Gupta, Appl. Opt. 49, 3458 (2010).
[CrossRef]

M. K. Swami, H. S. Patel, A. Uppal, P. K. Kushwaha, and P. K. Gupta, in International Conference on Fibre Optics and Photonics, OSA Technical Digest (Optical Society of America, 2012), paper MPo.2.

Travis, K.

Tsai, T.

Uppal, A.

M. K. Swami, H. S. Patel, A. Uppal, P. K. Kushwaha, and P. K. Gupta, in International Conference on Fibre Optics and Photonics, OSA Technical Digest (Optical Society of America, 2012), paper MPo.2.

van Gemert, J.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Star, and J. van Gemert, Lasers Surg. Med. 12, 510 (1992).
[CrossRef]

Wang, Y.

Wax, A.

Whelan, W. M.

S. Grabtchak, T. J. Palmer, and W. M. Whelan, J. Biomed. Opt. 16, 077003 (2011).
[CrossRef]

Wilson, B. C.

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Star, and J. van Gemert, Lasers Surg. Med. 12, 510 (1992).
[CrossRef]

Yuan, H.

Zhou, C.

Appl. Opt. (1)

Biomed. Opt. Express (1)

J. Biomed. Opt. (1)

S. Grabtchak, T. J. Palmer, and W. M. Whelan, J. Biomed. Opt. 16, 077003 (2011).
[CrossRef]

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

Langmuir (1)

T. K. Sau and C. J. Murphy, Langmuir 20, 6414 (2004).
[CrossRef]

Lasers Surg. Med. (1)

S. T. Flock, S. L. Jacques, B. C. Wilson, W. M. Star, and J. van Gemert, Lasers Surg. Med. 12, 510 (1992).
[CrossRef]

Nature Phys. Sci. (1)

G. Frens, Nature Phys. Sci. 241, 20 (1973).
[CrossRef]

Opt. Commun. (1)

J. Soni, H. Purwar, and N. Ghosh, Opt. Commun. 285, 1599 (2012).
[CrossRef]

Opt. Express (1)

Opt. Lett. (1)

Other (1)

M. K. Swami, H. S. Patel, A. Uppal, P. K. Kushwaha, and P. K. Gupta, in International Conference on Fibre Optics and Photonics, OSA Technical Digest (Optical Society of America, 2012), paper MPo.2.

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Figures (4)

Fig. 1.
Fig. 1.

(a) Wavelength dependence of depolarization for different concentrations of Intralipid; the value of μs at 532 nm for the concentrations used is indicated. (b) Depolarization of linear and circular polarization.

Fig. 2.
Fig. 2.

(a) Depolarization in the presence of spherical GNPs. (b) Depolarization of linear and circular polarization in the presence of 8 nm spherical NPs. Inset: Mie scattering cross section of GNPs normalized with their respective extinction cross sections at SPR.

Fig. 3.
Fig. 3.

(a) Depolarization from a suspension of GNRs and its SPR (circles). (b) Depolarization of linear and circularly polarized light.

Fig. 4.
Fig. 4.

Effect of addition of Intralipid to GNR suspension on depolarization.

Equations (1)

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Δ=1(Qo2+Uo2+Vo2)1/2/Io.

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