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    Ikonnikov, Denis A..
    Tailoring diffraction of light carrying orbital angular momenta / D. A. Ikonnikov, A. M. Vyunishev // Opt. Lett. - 2020. - Vol. 45, Is. 14. - P. 3905-3908, DOI 10.1364/OL.389019. - Cited References: 29. - Russian Science Foundation (19-12-00203). . - ISSN 0146-9592. - ISSN 1539-4794
   Перевод заглавия: Управление дифракцией пучков света с орбитальным угловым моментом

РУБ Optics
Рубрики:
OPTICAL VORTICES
ENTANGLEMENT
TWEEZERS
Аннотация: A unified approach to controlling the diffraction of light carrying orbital angular momenta (OAM) is developed and experimentally verified in this Letter. This approach allows one to specify not only the number of diffraction maxima, their spatial frequencies, and the intensity distribution between them, but also the OAM in each maximum. It is verified that the approach can be used for structuring both single and multiple beams carrying OAMs. Simulations reveal phase singularities in structured beams. In addition, the approach makes it possible to shape the light in regular and irregular two-dimensional arrays with addressing the OAMs at each site. This approach offers new opportunities for singular optics.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Vyunishev, A. M.; Вьюнышев, Андрей Михайлович; Иконников, Денис Андреевич; Russian Science FoundationRussian Science Foundation (RSF) [19-12-00203]
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Ghost image restoring using random speckles created by a liquid crystal cell / N. N. Davletshin, D. A. Ikonnikov, V. S. Sutormin [et al.] // Opt. Lett. - 2022. - Vol. 47, Is. 1. - P. 9-12, DOI 10.1364/OL.445684. - Cited References: 25 . - ISSN 0146-9592. - ISSN 1539-4794

РУБ Optics

Аннотация: A liquid crystal cell is used to produce correlated light beams with speckle structures for implementation of pseudo-thermal ghost imaging. The liquid crystal cell makes it possible to provide random spatial intensity distributions, which are characterized by a low coefficient of mutual cross correlations. Ghost imaging of an object representing an amplitude mask is demonstrated. The quality of the reconstructed images was estimated by the method of structural similarity.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Davletshin, N. N.; Давлетшин, Николай Николаевич; Ikonnikov, Denis A.; Иконников, Денис Андреевич; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Baron, F. A.; Барон, Филипп Алексеевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович
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Near-field evolution of optical vortices and their spatial ordering behind a fork-shaped grating / D. A. Ikonnikov, S. A. Myslivets, V. G. Arkhipkin, A. M. Vyunishev // Photonics. - 2023. - Vol. 10, Is. 4. - Ст. 469, DOI 10.3390/photonics10040469. - Cited References: 32. - The work is supported by the Russian Science Foundation (grant No. 19-12-00203) . - ISSN 2304-6732
Кл.слова (ненормированные):
fork-shaped grating -- optical vortex -- optical singularity -- near-field diffraction
Аннотация: Fork-shaped gratings are periodic structures containing a spatial dislocation known to be used for the production of optical vortices in a far field. Spatial overlapping of diffraction orders in a near field results in complex spatial evolution of optical vortices. In this paper, we report the results of near-field diffraction on fork-shaped gratings with different topological charges and analyze the evolution of specific optical vortices during propagation. Optical vortices have been shown to form two-dimensional well-ordered spatial configurations in specific transverse planes. The locus of points of optical singularities has been shown to form two helical lines twisted around the ±1 diffraction order directions. Our results demonstrate that the spatial behaviour of optical vortices is in close connection with the spatial ordering arising from the Talbot effect. The quantity of optical vortices demonstrates complex spatial dynamics, which includes spatial oscillations and decreasing along the propagation direction. These results provide a foundation towards a deeper understanding of near-field singular optics phenomena.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Department of Photonics and Laser Technology, Siberian Federal University, 660079 Krasnoyarsk, Russia

Доп.точки доступа:
Ikonnikov, Denis A.; Иконников, Денис Андреевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vyunishev, A. M.; Вьюнышев, Андрей Михайлович
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