Picosecond time scale modification of forward scattered light induced by absorption inside particles

Myriam Kervella (1) , François-Xavier d'Abzac (1) , François Hache (2) , Laurent Hespel (1) , Thibault Dartigalongue (1)

1 ONERA - The French Aerospace Lab [Châtillon]
2 LOB - Laboratoire d'optique et biosciences

The aim of this work is to evaluate the influence of absorption processes on the Time Of Flight (TOF) of the light scattered out of a thick medium in the forward direction. We use a Monte-Carlo simulation with temporal phase function and Debye modes. The main result of our study is that absorption inside the particle induces a decrease of the TOF on a picosecond time scale, measurable with a femtosecond laser apparatus. This decrease, which exhibits a neat sensitivity to the absorption coefficient of particles, could provide an efficient way to measure this absorption. © 2011 OSA

Domaines: Optique [physics.optics]

Myriam Kervella, François-Xavier d'Abzac, François Hache, Laurent Hespel, Thibault Dartigalongue. Picosecond time scale modification of forward scattered light induced by absorption inside particles. Optics Letters, 2011, 20 (1), pp.32-41. ⟨10.1364/OE.20.000032⟩. ⟨hal-00094273⟩