Imaging light transport at the femtosecond scale : A walk on the wild side of diffusion
Material type: TextPublication details: Firenze University Press 2018Description: 1 electronic resource (150 p.)ISBN:- 978-88-6453-781-8
Item type | Current library | Call number | Status | Date due | Barcode | |
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E-Book | Directory of Open Access Books | Not For Loan |
Open Access
Paper, milk, clouds and white paint share a common property: they are opaque disordered media through which light scatters randomly rather than propagating in a straight path. For very thick and turbid media, indeed, light eventually propagates in a 'diffusive' way, i.e. similarly to how tea infuses through hot water. Frequently though, a material is neither perfectly opaque nor transparent and the simple diffusion model does not hold. In this work, we developed a novel optical-gating setup that allowed us to observe light transport in scattering media with sub-ps time resolution. An array of unexplored aspects of light propagation emerged from this spatio-temporal description, unveiling transport regimes that were previously inaccessibile due to the extreme time scales involved and the lack of analytical models.
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