Does the structure of light influence the speckle size?

XB Hu, MX Dong, ZH Zhu, W Gao… - Scientific reports, 2020 - nature.com
It is well known that when a laser is reflected from a rough surface or transmitted through a
diffusive medium, a speckle pattern will be formed at a given observation plane. An …

Cosine beam: diffraction-free propagation and self-healing

A Bencheikh, S Chabou, OC Boumeddine, H Bekkis… - JOSA A, 2020 - opg.optica.org
In this paper we revisit the nondiffracting properties of the cosine beam (CB). Since the CB is
of infinite extension and not physically realizable, we use two apodization pupils to manage …

Optical mode conversion through nonlinear two-wave mixing

DG Pires, JCA Rocha, AJ Jesus-Silva, EJS Fonseca - Physical Review A, 2019 - APS
Hermite‐Gaussian (HG), Laguerre‐Gaussian (LG), and Ince-Gaussian (IG) modes have
been of considerable importance for photonics. They have revealed a unique way to optical …

The non-diffracting nature of truncated Hermite–Gaussian beams

A Bencheikh, A Forbes - JOSA A, 2020 - opg.optica.org
Using the asymptotic formula of the Hermite polynomials for higher-orders n≫ 1, an elegant
mathematical expression that makes Hermite–Gaussian beams and cosine beams …

Exact solutions for non-Rayleigh nondiffracting speckles

JGMN Neto, EJS Fonseca, AJ Jesus-Silva - Physical Review A, 2022 - APS
We report on a speckle field that is non-Rayleigh, nondiffracting, and an exact solution to the
scalar Helmholtz equation. We have shown that these fields can be directly optimized to a …

Hyperuniformity in amorphous speckle patterns

D Di Battista, D Ancora, G Zacharakis, G Ruocco… - Optics express, 2018 - opg.optica.org
Hyperuniform structures possess the ability to confine and drive light, although their
fabrication is extremely challenging. Here we demonstrate that speckle patterns obtained by …

Self-healing of the statistical properties of exact non-Rayleigh nondiffracting speckle fields

JGMN Neto, IJS Melo, EJS Fonseca, AJ Jesus-Silva - Physical Review A, 2024 - APS
We investigate the capacity of the exact non-Rayleigh nondiffracting (ENRND) speckle field
to reconstruct its statistical properties along the propagation. It is unclear in the literature how …

Method to define non-diffracting optical beams mimicking the shape of simple plane curves

JP Amaral, JCA Rocha, EJS Fonseca… - Applied Optics, 2019 - opg.optica.org
We theoretically and experimentally demonstrate a method to define non-diffracting beams
with different geometries. Our findings constitute an alternative to current methods for finding …

Soluções exatas da equação de Helmholtz para campos de speckles não Rayleigh não difrativos

JGM Nascimento Neto - 2022 - repositorio.ufal.br
O Espalhamento de uma luz coerente por um meio desordenado, em geral, gera speckles
exibindo estatísticas Rayleigh. A pesquisa sobre padrões de speckle foi desenvolvida ao …

Generation of speckle vortices by double Archimedes' spiral micro-holes array

T Liu, P Sun, H Sun - Holography, Diffractive Optics, and …, 2018 - spiedigitallibrary.org
Speckle fields contain many random dark and bright spots. In traditional speckle interference
measurement technique, the information of the bright areas is fully utilized, and the speckle …