Spatio-temporal light springs: extended encoding of orbital angular momentum in ultrashort pulses

Pariente, G.; Quéré, F.

doi:10.1364/ol.40.002037

Cited by 100 publications

(76 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recent results showed that EUV harmonic vortices with single-OAM exhibit similar divergence due to OAM conservation262829, thus allowing the synthesization of harmonic vortices into attosecond helical beams, i.e., attosecond pulse trains delayed along the azimuthal coordinate. This particular spatio-temporal light structure, also named “light spring”, results from the addition of harmonic vortices with different topological charges52.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, an structured attosecond helical beam –or “structured attosecond light spring”– is obtained, where the linear polarization rotates along the azimuth coordinate. Note that the number of interwinded helices that conform the attosecond helical beam is given by , i.e., the order difference between successive harmonics in the spectrum ( δn ) times the topological charge of the driving beam ()52. While in integer-OAM HHG two interwinded helices were obtained262829, when using fractional-OAM beams a single helix is produced (note that and δn = 2, as only odd-order harmonics are produced).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Extreme Ultraviolet Fractional Orbital Angular Momentum Beams from High Harmonic Generation

Turpin

Rego

Picón

et al. 2017

Sci Rep

View full text Add to dashboard Cite

We investigate theoretically the generation of extreme-ultraviolet (EUV) beams carrying fractional orbital angular momentum. To this end, we drive high-order harmonic generation with infrared conical refraction (CR) beams. We show that the high-order harmonic beams emitted in the EUV/soft x-ray regime preserve the characteristic signatures of the driving beam, namely ringlike transverse intensity profile and CR-like polarization distribution. As a result, through orbital and spin angular momentum conservation, harmonic beams are emitted with fractional orbital angular momentum, and they can be synthesized into structured attosecond helical beams –or “structured attosecond light springs”– with rotating linear polarization along the azimuth. Our proposal overcomes the state of the art limitations for the generation of light beams far from the visible domain carrying non-integer orbital angular momentum and could be applied in fields such as diffraction imaging, EUV lithography, particle trapping, and super-resolution imaging.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Extreme Ultraviolet Fractional Orbital Angular Momentum Beams from High Harmonic Generation

Turpin

Rego

Picón

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…In analogy to what was shown in [26], both cases present a helical attosecond pulse train structure, i.e., an attosecond pulse train delayed along the azimuthal coordinate according to the phase variation of the fundamental OAM beam. Note that the helical beam structure is a result of the addition of harmonic vortices with different topological charges [48]. We can observe different helical pulse trains (which for convenience they are plotted in different colors) associated to the path contributions described in the previous section.…”

Section: Helical Attosecond Pulse Trains and Quantum Path Selectionmentioning

confidence: 89%

“…Thus, our results show the possibility of generating helical attosecond pulse trains with different spatio-temporal structures that could be selected depending on the application. These type of helical beams, where not only the phase but also the intensity profile have an helical structure, are beams able to exchange OAM in situations where standard Laguerre-Gauss beams cannot, opening an entire new light-matter interaction regime, [48].…”

Section: Helical Attosecond Pulse Trains and Quantum Path Selectionmentioning

confidence: 99%

Quantum-path signatures in attosecond helical beams driven by optical vortices

et al. 2015

View full text Add to dashboard Cite

High-order harmonic generation (HHG) driven by beams carrying orbital angular momentum has been recently demonstrated as a unique process to generate spatio-temporal coherent extreme ultraviolet (XUV)/x-ray radiation with attosecond helical structure. We explore the details of the mapping of the driving vortex to its harmonic spectrum. In particular we show that the geometry of the harmonic vortices is complex, arising from the superposition of the contribution from the short and long quantum paths responsible of HHG. Transversal phase-matching and quantum path interferences provide an explanation of the dramatic changes in the XUV vortex structure generated at different relative positions of the target respect to the laser beam focus. Finally, we show how to take advantage of transversal phase-matching to select helical attosecond beams generated from short or long quantum paths, exhibiting positive or negative temporal chirp respectively.

show abstract

“…The structure and properties of helical beams are explored in Ref. [41] in terms of superposition of different OAM modes. Phase-matching control of the temporal and spatial properties of attosecond helical beams is explored in Refs.…”

Section: Xuv Attosecond Helical Pulsesmentioning

confidence: 99%

Generation and Applications of Extreme-Ultraviolet Vortices

et al. 2017

View full text Add to dashboard Cite

Vortex light beams are structures of the electromagnetic field with a spiral phase ramp around a point-phase singularity. These vortices have many applications in the optical regime, ranging from optical trapping and quantum information to spectroscopy and microscopy. The extension of vortices into the extreme-ultraviolet (XUV)/X-ray regime constitutes a significant step forward to bring those applications to the nanometer or even atomic scale. The recent development of a new generation of X-ray sources, and the refinement of other techniques, such as harmonic generation, have boosted the interest of producing vortex beams at short wavelengths. In this manuscript, we review the recent studies in the subject, and we collect the major prospects of this emerging field. We also focus on the unique and promising applications of ultrashort XUV/X-ray vortex pulses.

show abstract

Spatio-temporal light springs: extended encoding of orbital angular momentum in ultrashort pulses

Cited by 100 publications

References 17 publications

Extreme Ultraviolet Fractional Orbital Angular Momentum Beams from High Harmonic Generation

Extreme Ultraviolet Fractional Orbital Angular Momentum Beams from High Harmonic Generation

Quantum-path signatures in attosecond helical beams driven by optical vortices

Generation and Applications of Extreme-Ultraviolet Vortices

Contact Info

Product

Resources

About