Femtosecond time-resolved reflectometry for studying micro and nanostructured strongly scattering material

V. M. Gordienko; K. P. Bestemyanov; A. S. Khomenko; A. N. Konovalov; A. A. Podshivalov

doi:10.1117/12.633701

7 June 2005 Femtosecond time-resolved reflectometry for studying micro and nanostructured strongly scattering material

V. M. Gordienko, K. P. Bestemyanov, A. S. Khomenko, A. N. Konovalov, A. A. Podshivalov

Proceedings Volume 5850, Advanced Laser Technologies 2004; (2005) https://doi.org/10.1117/12.633701
Event: Advanced Laser Technologies 2004, 2004, Rome and Frascati, Italy

Abstract

Balanced heterodyne technique for registration of backscattered Cr:forsterite femtosecond radiation from strongly scattering material has been developed. It was found that the dependence of response signal for strongly scattering media on time delay has long 'tail'. The tail is the result of multiple scattering processes. The exponential index is defined by photon lifetime in strongly scattering media. Dynamics of vaporization of ethanol from random porous material (paper) was investigated and velocity of evolution of liquid-vapor interface was measured V=0,08m/s. Laser induced sintering process in polystyrene powder was investigated and velocity of sintered zone increasing was measured V≈100μm/s.

Citation Download Citation

V. M. Gordienko, K. P. Bestemyanov, A. S. Khomenko, A. N. Konovalov, and A. A. Podshivalov "Femtosecond time-resolved reflectometry for studying micro and nanostructured strongly scattering material", Proc. SPIE 5850, Advanced Laser Technologies 2004, (7 June 2005); https://doi.org/10.1117/12.633701

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