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Analytical description of partially coherent propagation and absorption losses in x-ray planar waveguides.
Tsanaktsidis, K J; Paganin, D M; Pelliccia, D.
Afiliação
  • Tsanaktsidis KJ; School of Physics, Monash University, Victoria 3800, Australia.
Opt Lett ; 38(11): 1808-10, 2013 Jun 01.
Article em En | MEDLINE | ID: mdl-23722751
We present an analytical approach to describe field propagation along a planar x-ray waveguide (WG) in the presence of absorption losses. The method utilizes the complete expression for the complex index of refraction in solving the Helmholtz equation describing the guided modes. In this way, the propagation modes for the WG are no longer imposed to be standing waves and the energy flow from the core to the cladding, a consequence of the absorption in the cladding, can be calculated. In addition, the method accurately describes the field coupling between a plane wave and the WG, reproducing the self-imaging phenomenon. The case of partially coherent illumination has also been calculated for a realistic laboratory x-ray source.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Imagem Óptica Idioma: En Ano de publicação: 2013 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Imagem Óptica Idioma: En Ano de publicação: 2013 Tipo de documento: Article