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Computation of diffracted fields for the case of high numerical aperture using the angular spectrum method |
Applied Optics, Vol. 51, Issue 29, pp. 7080-7088 (2012)
http://dx.doi.org/10.1364/AO.51.007080
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Abstract
The angular spectrum (AS) method is a popular solution to the Helmholtz Equation without the use of approximations. In this work, new criteria on sampling requirements are derived using the Wigner distribution (WD). It is shown that for the case of high numerical aperture the conventional AS method requires a very large amount of zero-padding, making it impractical due to requirements on memory and computational effort. This work proposes the use of a modified AS algorithm that evaluates only non-zero components of the field. The results obtained from the WD combined with the modified AS algorithm enable an accurate and efficient field computation for cases where the conventional AS method cannot be implemented.
© 2012 Optical Society of America
OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(090.0090) Holography : Holography
(050.1755) Diffraction and gratings : Computational electromagnetic methods
ToC Category:
Diffraction and Gratings
History
Original Manuscript: July 6, 2012
Revised Manuscript: September 13, 2012
Manuscript Accepted: September 13, 2012
Published: October 9, 2012
Citation
Tomasz Kozacki, Konstantinos Falaggis, and Malgorzata Kujawinska, "Computation of diffracted fields for the case of high numerical aperture using the angular spectrum method," Appl. Opt. 51, 7080-7088 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-29-7080
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