Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.1002/andp.202200480
Аннотация: <jats:title>Abstract</jats:title><jats:p>The near-field effect of diffraction image self-reproduction or self-imaging of a periodic grating illuminated by quasi-monochromatic wave is well-known as the Talbot effect. Introducing a dislocation to a periodic structure provides a fork-shaped modulation of the phase/amplitude, which proПоказать полностьюduces discrete diffraction pattern in a far-field consisting of optical vortices. In this paper, Fresnel diffraction at amplitude fork-shaped grating is theoretically and experimentally studied. The coexistence of spatial ordering and local violation of translational symmetry of the structure manifests itself in a strict diffraction pattern consisting of optical vortices in the far-field, which is shown to be accompanied by formation of a spatially ordered intensity distribution in the near-field, reminiscent the Talbot carpets for periodic structures. These results demonstrate the first evidence of Talbot effect occurred under light diffraction at fork-shaped gratings, being promising for deep understanding of near-field singular optics phenomena.</jats:p>
Журнал: Annalen der Physik (Leipzig)
Выпуск журнала: Т. 535, № 3
ISSN журнала: 00033804
Издатель: A Huthig