Possible coherent backscattering of lightwaves from a strongly absorbing nanoporous medium
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GAPONENCO, Sergey, MONAICO, Eduard, SERGENTU, Vladimir, PRISLOPSKI, Sergey, TIGINYANU, Ion. Possible coherent backscattering of lightwaves from a strongly absorbing nanoporous medium. In: Journal of Optics (United Kingdom), 2018, vol. 20, p. 0. ISSN 2040-8978. DOI: https://doi.org/10.1088/2040-8986/aac841
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Journal of Optics (United Kingdom)
Volumul 20 / 2018 / ISSN 2040-8978 /ISSNe 2040-8986

Possible coherent backscattering of lightwaves from a strongly absorbing nanoporous medium

DOI: https://doi.org/10.1088/2040-8986/aac841

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Gaponenco Sergey1, Monaico Eduard2, Sergentu Vladimir3, Prislopski Sergey1, Tiginyanu Ion2
 
1 Stepanov Institute of Physics, National Academy of Sciences of Belarus,
2 Technical University of Moldova,
3 Institute of Applied Physics, Academy of Sciences of Moldova
 
Disponibil în IBN: 8 august 2018


Rezumat

We report on anomalous light retroreflection from strongly absorbing nanoporous semiconductor materials, GaAs and InP, with strongly polarized retroreflected light with linear polarization coinciding with that of incident beams. The high polarization of retroreflected waves suggests coherent backscattering as the underlying physical mechanism. This phenomenon resulting from multiple scattering is supposed to be possible in an absorbing medium owing to longitudinal electromagnetic waves generated at interfaces. Strong absorption for transverse waves has negligible effect on longitudinal ones and therefore does not prevent their multiple scattering but ensures a high refraction index promoting strong scattering. This hypothesis is supported by a theoretical model and calculations.

Cuvinte-cheie
Coherent backscattering, GaAs, InP, longitudinal electromagnetic waves, nanoporous materials