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Titolo:
Limits of scalar diffraction theory and an iterative angular spectrum algorithm for finite aperture diffractive optical element design
Autore:
Mellin, SD; Nordin, GP;
Indirizzi:
Univ Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899 USA Univ Alabama Huntsville AL USA 35899 Comp Engn, Huntsville, AL 35899 USA
Titolo Testata:
OPTICS EXPRESS
fascicolo: 13, volume: 8, anno: 2001,
pagine: 705 - 722
SICI:
1094-4087(20010618)8:13<705:LOSDTA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
IMAGE-RECONSTRUCTION; HOLOGRAPHY; GRATINGS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Mellin, SD Univ Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899 USA Univ Alabama Huntsville AL USA 35899 Huntsville, AL 35899 USA
Citazione:
S.D. Mellin e G.P. Nordin, "Limits of scalar diffraction theory and an iterative angular spectrum algorithm for finite aperture diffractive optical element design", OPT EXPRESS, 8(13), 2001, pp. 705-722

Abstract

We have designed high-efficiency finite-aperture diffractive optical elements (DOE's) with features on the order of or smaller than the wavelength ofthe incident illumination. The use of scalar diffraction theory is generally not considered valid for the design of DOE's with such features. However, we have found several cases in which the use of a scalar-based design is,in fact, quite accurate. We also present a modified scalar-based iterativedesign method that incorporates the angular spectrum approach to design diffractive optical elements that operate in the near-field and have sub-wavelength features. We call this design method the iterative angular spectrum approach (IASA). Upon comparison with a rigorous electromagnetic analysis technique, specifically, the finite difference time-domain method (FDTD), wefind that our scalar-based design method is surprisingly valid for DOE's having sub-wavelength features. (C) 2001 Optical Society of America.

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Documento generato il 26/01/20 alle ore 09:58:03