Vortex Speckles with Customized Symmetry and Spatial Correlations

Ye, Zhiyuan; Hou, Wanting; Zhao, Jilun; Wang, Haibo; Xiong, Jun

doi:10.1103/physrevapplied.18.064060

Cited by 3 publications

(1 citation statement)

References 70 publications

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“…Therefore, the generation of spatiotemporal dynamically tunable OV beams provides a good example to the study of spatial dynamic changes of OAM beams. To this end, researchers have proposed many methods to modulate and generate such OAM beams, for example, the combination of annular division of the radial OV phase [24][25][26][27][28][29], off-axis OV to generate multiple OAMs [30,31] and the method of OAM superimposing beams [32][33][34][35]. However, for the azimuthal phase imparting OAM, there is no method for splitting combinations based on Fibonacci series annular subzone (FSAS).…”

Section: Introductionmentioning

confidence: 99%

Generation of dynamic rotation propagation vortex beam by a Fibonacci series annular subzone vortex phase

Yang,

Sun,

Feng

et al. 2024

J. Phys. D: Appl. Phys.

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Recently, the optical vortex (OV) has gained increasing interest since the potential for applications of the orbital angular momentum (OAM) carried by optical vortex beams. However, generation is currently limited single static cricular intensity profile, greatly constraining the breadth of achievable spatiotemporal dynamics. Here, we propose a novel phase distribution to generate a dynamic propagation OV with a customized topological charge (TC ≥ 10) based on Fibonacci series annular subzone by tailoring the local phase gradient along the azimuthal direction. We describe the generation of the Fibonacci series annular subzone vortex phase. The Fibonacci vortex beam (FVB) have customization TC, multi-singularity intensity distributions. Furthermore, such optical fields exhibit the spatial dynamic rotation and self-focusing have yielded fascinating phenomena. The simulation results are agreed with the experimental results, which provides an important basis for the generation of OV with spatial dynamic propagation. These results contribute to the advanced complex light manipulation with spatial dynamic propagation and pave the way to achieve a new laser with the structured light based on modified phase control.

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Section: Introductionmentioning

confidence: 99%

Generation of dynamic rotation propagation vortex beam by a Fibonacci series annular subzone vortex phase

Yang,

Sun,

Feng

et al. 2024

J. Phys. D: Appl. Phys.

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High-visibility calculating ghost imaging with self-reconstruction capability and extendible depth-of-field

Zhou,

Zhang,

et al. 2024

Opt. Express

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We customized light speckle fields with both super-bunching and non-diffracting properties, accordingly named as the super-bunching, non-diffracting (SP-ND) speckle fields, by introducing pupil function of a ring aperture with azimuthally correlated phases in the vertically opposite angles. Calculating ghost imaging based on the SP-ND speckle fields was demonstrated to be of higher visibility, higher spatial resolution and larger depth of field than that based on the conventional speckle fields such as pseudo-thermal fields. Interestingly, the SP-ND speckles are also of self-healing capability in respect of not only the speckle intensity distribution but also the high-order coherence properties. Therefore, even when the SP-ND speckle fields are seriously disturbed, for example, blocked partially by an opaque obstacle, ghost images are able to be reconstructed once the object is placed in the self-healed speckle fields.

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Spatial anti-bunching correlation in random light fields

Yu,

Zhang,

et al. 2024

Opt. Express

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Spatial anti-bunching, in contrast to the well-known bunching behavior observed in classical light sources, describes a situation where photons tend to avoid each other in space, resulting in a reduced probability of detecting two or more photons in proximity. This anti-bunching effect, a hallmark of nonclassical light, signifies a deviation from classical intensity fluctuations and has been observed not only in free electrons and entangled photon pairs but also in chaotic-thermal light. This work investigates the generation mechanism of spatial anti-bunching correlation in random light fields, leveraging the wandering of light centers to induce a second-order coherence degree below unity. Unlike traditional Gaussian Schell-model partially coherent light, this work predicts the emergence of two fundamentally distinct orbital angular momentum states, arising from the inherent differences between rigid body rotation and fluid-like rotation in the wandering light. These predictions are supported by experimental evidence. Based on these findings, we propose a resolution-enhanced lensless ghost imaging system as an application example. Experimental results indicate that the adoption of the anti-bunching correlated light field as the illumination source enables the imaging system to attain super-resolution imaging capabilities. Our findings provide new insights into the utilization of anti-correlated light fields for precision imaging and detection applications.

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Vortex Speckles with Customized Symmetry and Spatial Correlations

Cited by 3 publications

References 70 publications

Generation of dynamic rotation propagation vortex beam by a Fibonacci series annular subzone vortex phase

Generation of dynamic rotation propagation vortex beam by a Fibonacci series annular subzone vortex phase

High-visibility calculating ghost imaging with self-reconstruction capability and extendible depth-of-field

Spatial anti-bunching correlation in random light fields

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