Výsledky vyhledávání

1D spatially chirped periodic structures: managing their spatial spectrum and investigating their near-field diffraction

Autor: Mohammadreza Zarei, Davud Hebri, Saifollah Rasouli

Publikováno v: Journal of the Optical Society of America. A, Optics, image science, and vision. 39(12)

This work introduces a class of 1D spatial-frequency-modulated structures with transmittance T ( x ) , in which the period changes along the x axis so that the corresponding spatial frequency f ( x ) sinusoidally alternates between two values. It is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c63029c1164d1bed1e4b072953e35822
https://pubmed.ncbi.nlm.nih.gov/36520759

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Theory and generation of heterogeneous 2D arrays of optical vortices by using 2D fork-shaped gratings: topological charge and power sharing management

Autor: Ali Mohammad Khazaei, Davud Hebri, Saifollah Rasouli

Publikováno v: Optics Express. 31:16361

In this work, by providing comprehensive theoretical foundations, we revisit and improve a simple and efficient method that has been used for generation of 2D orthogonal arrays of optical vortices with components having different topological charges

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::70716135292b629a59948b83ea2735dd
https://doi.org/10.1364/oe.487501

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Theoretical study on the diffraction-based generation of a 2D orthogonal lattice of optical beams: physical bases and application for a vortex beam multiplication

Autor: Davud Hebri, Saifollah Rasouli

Publikováno v: Journal of the Optical Society of America A. 39:1694

A comprehensive theoretical study on the generation of a 2D orthogonal lattice of optical beams based on the near-field diffraction and Talbot effect is presented. First we investigate the near-field diffraction of an optical beam with a finite later

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::944293301e60ffc42aa2f8f85bc4bc87
https://doi.org/10.1364/josaa.459929

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Talbot effect of azimuthally periodic Bessel-based structures

Autor: Davud Hebri, Saifollah Rasouli, Mohammad Bagheri

Publikováno v: Optics letters. 44(17)

In this work, the theory of self-imaging in the polar coordinates for azimuthally periodic Bessel-based structures (APBBSs) is presented. For the first time, to the best of our knowledge, we define single- and multi-frequency APBBSs and show that the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::215e1ce0a3050a7ba118d58d0d6971af
https://pubmed.ncbi.nlm.nih.gov/31465400

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Diffraction from two-dimensional orthogonal nonseparable periodic structures: Talbot distance dependence on the number theoretic properties of the structures

Autor: Saifollah Rasouli, Davud Hebri

Publikováno v: Journal of the Optical Society of America. A, Optics, image science, and vision. 36(2)

In this work, the diffraction-based discrimination of two-dimensional (2D) orthogonal separable and nonseparable periodic structures and prediction of the reduced Talbot distances for 2D orthogonal nonseparable periodic structures are presented. 2D o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b33be82cec10b453dacad355c1d2378
https://pubmed.ncbi.nlm.nih.gov/30874103

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Combined half-integer Bessel-like beams: A set of solutions of the wave equation

Autor: Saifollah Rasouli, Davud Hebri

Publikováno v: Physical Review A. 98

We report a family of solutions of the homogeneous free-space scalar wave equation. These solutions are determined by linear combinations of the half-integer order Bessel functions. We call these beams ``combined half-integer Bessel-like beams.'' It

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0abee75e565a854b2e7324e056ffb7e6
https://doi.org/10.1103/physreva.98.043826

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Radial carpet beams: A class of nondiffracting, accelerating, and self-healing beams

Autor: Davud Hebri, Saifollah Rasouli, Ali Mohammad Khazaei

Publikováno v: Physical Review A. 97

Self-accelerating shape-invariant beams are attracting major attention, presenting applications in many areas such as laser manipulation and patterning, light-sheet microscopy, and plasma channels. Moreover, optical lattices are offering many applica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e5fe95a7c1bea39f0dc637286678bf83
https://doi.org/10.1103/physreva.97.033844

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Talbot carpet at the transverse plane produced in the diffraction of plane wave from amplitude radial gratings

Autor: Ali Mohammad Khazaei, Davud Hebri, Saifollah Rasouli

Publikováno v: Journal of the Optical Society of America. A, Optics, image science, and vision. 35(1)

We experimentally demonstrate and theoretically predict a new and unprecedented optical carpet that includes all the geometric shadow and far-field and near-field diffraction patterns at the transverse plane in the diffraction from a radial grating i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06355fb896c7bcc708def4c3397849da
https://pubmed.ncbi.nlm.nih.gov/29328092

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