Broadband control of topological–spectral correlations in space–time beams

Piccardo, Marco; Oliveira, Michael de; Policht, Veronica R.; Russo, Mattia; Ardini, Benedetto; Corti, Matteo; Valentini, Gianluca; Vieira, Jorge; Manzoni, Cristian; Cerullo, Giulio; Ambrosio, Antonio

doi:10.1038/s41566-023-01223-y

Cited by 25 publications

(8 citation statements)

References 55 publications

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“…Moreover, the generated LS has broad TC bandwidth in spectral domain, which, according to Eq. (7), is proportional to the seed pulse bandwidth Δω, angular dispersion coefficient η and the beam size a. From Figs.…”

Section: Discussionmentioning

confidence: 95%

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Direct space–time manipulation mechanism for spatio-temporal coupling of ultrafast light field

Lin,

Feng,

Cai

et al. 2024

Nat Commun

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Traditionally, manipulation of spatiotemporal coupling (STC) of the ultrafast light fields can be actualized in the space-spectrum domain with some 4-f pulse shapers, which suffers usually from some limitations, such as spectral/pixel resolution and information crosstalk associated with the 4-f pulse shapers. This work introduces a novel mechanism for direct space-time manipulation of ultrafast light fields to overcome the limitations. This mechanism combines a space-dependent time delay with some spatial geometrical transformations, which has been experimentally proved by generating a high-quality STC light field, called light spring (LS). The LS, owing a broad topological charge bandwidth of 11.5 and a tunable central topological charge from 2 to −11, can propagate with a stable spatiotemporal intensity structure from near to far fields. This achievement implies the mechanism provides an efficient way to generate complex STC light fields, such as LS with potential applications in information encryption, optical communication, and laser-plasma acceleration.

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Section: Discussionmentioning

confidence: 95%

“…Spatiotemporal coupling (STC) light fields 1 , with inseparable space and time distributions, have garnered great interest in fundamental studies of space-time light manipulation over the past decade [2][3][4][5][6][7][8] . They include ultrashort pulse velocity control 9 , nonlinear optics 10 , and others.…”

mentioning

confidence: 99%

Direct space–time manipulation mechanism for spatio-temporal coupling of ultrafast light field

Lin,

Feng,

Cai

et al. 2024

Nat Commun

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“…Recently, many efforts have been devoted to developing novel techniques to synthesize ultrashort light pulses with on-demand spatiotemporal configurations . Experimental demonstrations of such spatiotemporal light states include the generation of propagation-invariant optical wave packets with controllable group velocity, , spatiotemporal orbital angular momentum (OAM) dynamic beams, − and toroidal photonic vortices. , A key requirement for utilizing spatiotemporal light structures in their entirety is the capability to accurately discern their physical properties. To date, there exist distinct approaches to probe pulsed beams, e.g., techniques based on spatially resolved spectral interferometry such as SEA-TADPOLE, STARFISH, and TERMITES; relying on wavefront sensing such as HAMSTER; based on spectrally resolved spatial interferometry such as STRIPED FISH and INSIGHT, as well as to identify topological charges associated with spatiotemporal vortices. , It is worth mentioning that some of those advancements in the characterization of spatiotemporal structures could find applications in other areas such as acoustics. , Notwithstanding this progress, it is not trivial to visualize and understand the measurements provided by these techniques.…”

Section: Introductionmentioning

confidence: 99%

Ptychography for Multidimensional Characterization of Spatiotemporal Ultrafast Pulses

Cruz-Delgado,

Perez-Leija,

Fontaine

et al. 2024

ACS Photonics

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Tailoring pulses with intertwined spatial and temporal degrees of freedom is a promising research area that offers applications in nonlinear optics, precision machining, and imaging to mention a few. The key requirement for harnessing such spatiotemporal light structures in their entirety is to accurately discern their physical properties. Here, we demonstrate that ptychography can be applied to reveal the modal, frequency, and temporal attributes of such ultrafast spatiotemporal optical pulses. To demonstrate the potential of our scheme, we examine optical fields with intricate spatial and spectrotemporal correlations. Further, since the exact structure of the pulses is determined utilizing purely linear interactions, our approach can serve to probe and correct a great variety of spatiotemporal designs.

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“…Driven by the diverse applications, many experimental configurations are proposed to generate and modulate the OAM beam, such as a pair of cylindrical lenses [9], spiral phase plates [10], spatial light modulator [11], q-plate [12,13], and meta-surface [14][15][16][17]. In recent years, to further unlock the full potential of OAM, beams with spatiotemporal dynamic propagation have drawn more and more attention [18][19][20]. The investigation of the space-time propagation of optical vortex field can further understand their physical properties [4,[21][22][23].…”

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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Broadband control of topological–spectral correlations in space–time beams

Cited by 25 publications

References 55 publications

Direct space–time manipulation mechanism for spatio-temporal coupling of ultrafast light field

Direct space–time manipulation mechanism for spatio-temporal coupling of ultrafast light field

Ptychography for Multidimensional Characterization of Spatiotemporal Ultrafast Pulses

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

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