Numerical errors of diffraction computing using plane wave spectrum decomposition |
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Authors: | Tomasz Kozacki |
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Institution: | Institute of Micromechanics and Photonics, Warsaw University of Technology, Sw. A. Boboli 8, 02-525 Warsaw, Poland |
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Abstract: | In the paper the numerical determination of diffraction patterns using plane wave spectrum decomposition (PWS) is investigated. The simple formula for sampling selection for error-free numerical computation is proposed and its applicability is discussed. The usage of this formula presents practical difficulty for some diffraction problems due to required large memory load. A new multi-Fourier transform PWS (MPWS) method is elaborated which overcomes memory requirement of the PWS method. The performances of the PWS and MPWS methods are verified through extensive numerical simulations. |
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