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Absorption length for photon propagation in highly dense colloidal dispersions

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Abstract

The absorption length for photon propagation in highly concentrated colloidal dispersions calculated from temporal intensity profiles of 100 femto-second pulses is much longer than the absorption length obtained from the measurements of static light transmission in the pure continuous phase fluid. The difference between these two values is explained on the basis of small interparticle spacing at high particle concentration and hence shorter paths traveled by photons through the absorbing medium relative to the total diffusive path in the dispersion. The two values are in good agreement when the absorption length is rescaled with the interparticle separation.

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Authors and Affiliations

  1. Department of Chemical Engineering and Princeton Materials Institute, Princeton University, 08544-5263, Princeton, New Jersey, USA

    Rajeev Garg, Robert K. Prud'homme & Ilhan A. Aksay

  2. Department of Physics and Electrical Engineering, Institute for Ultrafast Spectroscopy and Lasers, New York State, Center of Advanced Technology for Ultrafast Photonic Materials and Applications, The City College and the Graduate Center of the City University of New York, 10031, New York, New York, USA

    Feng Liu & Robert R. Alfano

Authors
  1. Rajeev Garg
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  2. Robert K. Prud'homme
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  3. Ilhan A. Aksay
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  4. Feng Liu
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  5. Robert R. Alfano
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Garg, R., Prud'homme, R.K., Aksay, I.A. et al. Absorption length for photon propagation in highly dense colloidal dispersions. Journal of Materials Research 13, 3463–3467 (1998). https://doi.org/10.1557/JMR.1998.0472

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  • DOI: https://doi.org/10.1557/JMR.1998.0472

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