Characterization of Extreme Ultraviolet Vortex Beams with a Very High Topological Charge

Pandey, Alok Kumar; Heras, Alba de las; Larrieu, Tanguy; Román, Julio San; Serrano, Francisco J. González; Plaja, Luis; Baynard, Elsa; Pittman, M.; Dovillaire, Guillaume; Kazamias, S.; Hernández-García, Carlos; Guilbaud, Olivier

doi:10.1021/acsphotonics.1c01768

Cited by 23 publications

(12 citation statements)

References 61 publications

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“…Therefore, the total wavefront twist in the transverse plane indicating the topological charge of vortex beams is within 2% of the theoretical expectation. These results unambiguously affirm the topological charge scaling of the HHG-OAM beams with harmonic order [18,29]: q = q 1 . Moreover, the sense of wavefront rotation changes from anticlockwise (b) to clockwise (f) following the sign of the topological charge of the driving beam, indicating tunability of OAM helicity for HHG-OAM beams.…”

Section: Generation Of High-harmonic Vector-vortex Beamssupporting

confidence: 78%

“…Owing to the long generation medium and thus a larger emitting volume, the signal level was sufficiently high to permit single-shot intensity and wavefront characterization of high topological charge HHG vortex beams. The characterization method based on EUV wavefront sensing allowed us to unambiguously assess the topological charge and OAM helicity of the HHG vortex beams, affirming the linear scaling of HHG beam topological charge with harmonic order [18,29]. Finally, through synchronous control of SAM and OAM of the driving beam, we show that the HHG process allows controlled generation of vector-vortex beams, thus merging the spatially varying polarization of a vector beam and the twisted wavefront of vortex beams.…”

Section: Discussionmentioning

confidence: 54%

“…On the macroscopic level, when the emitted radiation from a large number of individual atoms is phase-matched, the HHG allows mapping certain characteristics of the driving beam into the harmonic radiation. Exploiting the field-driven coherent nature of the HHG process, longwavelength structured-beam-driven HHG in noble gases has made long strides, enabling control and manipulation of OAM and/or SAM in the extreme-ultraviolet (EUV) spectral range [18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Extreme-ultraviolet structured beams via high harmonic generation

Pandey

Heras²,

Román³

et al. 2022

Eur. Phys. J. Spec. Top.

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Vigorous efforts to harness the topological properties of light have enabled a multitude of novel applications. Translating the applications of structured light to higher spatial and temporal resolutions mandates their controlled generation, manipulation, and thorough characterization in the short-wavelength regime. Here, we resort to high-order harmonic generation (HHG) in a noble gas to upconvert near-infrared (IR) vector, vortex, and vector-vortex driving beams that are tailored, respectively, in their spin angular momentum (SAM), orbital angular momentum (OAM), and simultaneously in their SAM and OAM. We show that HHG enables the controlled generation of extreme-ultraviolet (EUV) vector beams exhibiting various spatially dependent polarization distributions, or EUV vortex beams with a highly twisted phase. Moreover, we demonstrate the generation of EUV vector-vortex beams (VVB) bearing combined characteristics of vector and vortex beams. We rely on EUV wavefront sensing to unambiguously affirm the topological charge scaling of the HHG beams with the harmonic order. Interestingly, our work shows that HHG allows for a synchronous controlled manipulation of SAM and OAM. These EUV structured beams bring in the promising scenario of their applications at nanometric spatial and sub-femtosecond temporal resolutions using a table-top harmonic source.

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Section: Generation Of High-harmonic Vector-vortex Beamssupporting

confidence: 78%

Section: Discussionmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extreme-ultraviolet structured beams via high harmonic generation

Pandey

Heras²,

Román³

et al. 2022

Eur. Phys. J. Spec. Top.

View full text Add to dashboard Cite

show abstract

“…On the macroscopic level, when the emitted radiation from a large number of individual atoms is phase-matched, the HHG allows mapping certain characteristics of the driving beam into the harmonic radiation. Exploiting the field-driven coherent nature of the HHG process, long-wavelength structured-beam driven HHG in noble gases has made long strides, enabling control and manipulation of OAM and/or SAM in the extreme-ultraviolet (EUV) spectral range [18][19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Extreme-ultraviolet structured beams via high harmonic generation

Pandey¹,

Heras²,

Román³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

Vigorous efforts to harness the topological properties of light have enabled a multitude of novel applications. Translating the applications of structured light to higher spatial and temporal resolutions mandates their controlled generation, manipulation, and thorough characterization in the short-wavelength regime. Here, we resort to high-order harmonic generation (HHG) in a noble gas to upconvert nearinfrared (IR) vector, vortex, and vector-vortex driving beams that are tailored respectively in their Spin Angular Momentum (SAM), Orbital Angular Momentum (OAM), and simultaneously in their SAM and OAM. We show that HHG enables the controlled generation of extreme-ultraviolet (EUV) vector beams exhibiting various spatially-dependent polarization distributions, or EUV vortex beams with a highly twisted phase. Moreover, we demonstrate the generation of EUV vector-vortex beams (VVB) bearing combined characteristics of vector and vortex beams. We rely on EUV wavefront sensing to unambiguously affirm the topological charge scaling of the HHG beams with the harmonic order. Interestingly, our work shows that HHG allows for a synchronous controlled manipulation of SAM and OAM. These EUV structured beams bring in the promising scenario of their applications at nanometric spatial and sub-femtosecond temporal resolutions using a table-top harmonic source.

show abstract

“…First, circularly polarized attosecond pulses were obtained by using non-trivial geometries of the driving field [3][4][5]. Second, high harmonic vortices with high topological charge can be obtained through OAM conservation [6][7][8]. These two achievements over the SAM and OAM of highorder harmonic pulses, that resulted from several works from of many research groups, paved the way towards more sophisticated structured high harmonic and attosecond pulses: high-harmonic pulses with both OAM and SAM [9], high-harmonic vortices with timedependent OAM or self-torque [10], attosecond pulses with time-dependent polarization states [11], or EUV vector and vector/vortex beams with spatially varying polarization states [12,13], among others.…”

mentioning

confidence: 99%

Novel ultrafast structured EUV/x-ray sources from nonlinear optics

Hernández-García

2022

EPJ Web Conf.

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Coherent extreme-ultraviolet (EUV)/x-ray laser sources, structured in their temporal/spectral, spatial and angular momentum properties are emerging as unique tools to probe the nanoworld. One of the key ingredients for the emergence of such sources is the extraordinary coherence in the up-conversion of infrared laser sources through the highly nonlinear process of high-order harmonic generation. In this contribution we will review the advances during the last decade that led to the generation of structured EUV/xray sources, such as circularly polarized attosecond pulses, harmonic vortices with time-varying orbital angular momentum, ultrafast vector and vector/vortex beams, tunable high-order harmonic combs or attosecond pulse trains with time-dependent polarization states. The use of such sources is being already applied to the investigation of chiral matter or magnetic materials. In the latter case, structured ultrafast sources are very promising to achieve a complete understanding of the electronic and spin interactions that govern sub-femtosecond magnetization dynamics.

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Characterization of Extreme Ultraviolet Vortex Beams with a Very High Topological Charge

Cited by 23 publications

References 61 publications

Extreme-ultraviolet structured beams via high harmonic generation

Extreme-ultraviolet structured beams via high harmonic generation

Extreme-ultraviolet structured beams via high harmonic generation

Novel ultrafast structured EUV/x-ray sources from nonlinear optics

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