Near-monochromatic high-harmonic radiation from relativistic laser–plasma interactions with blazed grating surfaces

Yeung, M.; Dromey, B.; Rödel, Christian; Bierbach, J.; Wünsche, Martin; Paulus, Gerhard G.; Hahn, T.; Hemmers, D.; Stelzmann, C.; Pretzler, G.; Zepf, Matthew

doi:10.1088/1367-2630/15/2/025042

Cited by 14 publications

(11 citation statements)

References 30 publications

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“…To this aim, the blaze angle is chosen in order that the incident light is locally reflected in the same direction as the diffraction angle. In the high intensity regime, blazed gratings have been used to optimize high harmonic generation 42,43 (section IV).…”

Section: Source Optimization With Blazed Gratingsmentioning

confidence: 99%

Extreme high field plasmonics: Electron acceleration and XUV harmonic generation from ultrashort surface plasmons

et al. 2019

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Experiments on the excitation of propagating surface plasmons (SPs) by ultrashort, high intensity laser interaction with grating targets are reviewed. At intensities exceeding 10 19 W cm −2 on target, i.e. in the strongly relativistic regime of electron dynamics, multi-MeV electrons are accelerated by the SP field as dense bunches collimated in a near-tangent direction. By the use of a suitable blazed grating, the bunch charge can be increased up to ≈660 picoCoulomb. Intense XUV high harmonics (HHs) diffracted by the grating are observed when a plasma with sub-micrometer scale is produced at the target surface by a controlled prepulse. When the SP is excited, the HHs are strongly enhanced in a direction quasi-parallel to the electrons. Simulations suggest that the HHs are boosted by nanobunching in the SP field of the electrons which scatter the laser field. Besides the static and dynamic tailoring of the target density profile, further control of electron and HH emission might be achieved by changing the SP duration using a laser pulse with rotating wavefront. This latter technique may allow to produce nearly single-cycle SPs.

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Section: Source Optimization With Blazed Gratingsmentioning

confidence: 99%

Extreme high field plasmonics: Electron acceleration and XUV harmonic generation from ultrashort surface plasmons

et al. 2019

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“…Blazed diffraction grating is a special kind of grating target, which is widely used in optical spectrum measurement to enhance the spectrum brightness along a controllable direction [39]. In previous work, both numerical simulations and experiments have demonstrated that selected harmonics can be obtained from relativistic laser-plasma interactions with blazed grating targets when an appropriate blaze condition is satisfied, which provides a potential route to achieve near-monochromatic, short pulsed XUV radiation [29,40]. In this paper, we revisited the HHG from blazed grating targets and show that such targets cannot only select the specific harmonics in a specific direction through grating diffraction, but also enhance the maximum detectable harmonic order and intensity in a predetermined direction.…”

Section: ( )mentioning

confidence: 99%

Directional enhancement of selected high-order-harmonics from intense laser irradiated blazed grating targets

et al. 2017

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Relativistically intense laser solid target interaction has been proved to be a promising way to generate high-order harmonics, which can be used to diagnose ultrafast phenomena. However, their emission direction and spectra still lack tunability. Based upon two-dimensional particle-in-cell simulations, we show that directional enhancement of selected high-order-harmonics can be realized using blazed grating targets. Such targets can select harmonics with frequencies being integer times of the grating frequency. Meanwhile, the radiation intensity and emission area of the harmonics are increased. The emission direction is controlled by tailoring the local blazed structure. Theoretical and electron dynamics analysis for harmonics generation, selection and directional enhancement from the interaction between multi-cycle laser and grating target are carried out. These studies will benefit the generation and application of laser plasma-based high order harmonics.

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“…9,10 In this paper, we report on the emission of multi-MeV electron bunches accelerated along the target surface during short pulse laser-interaction with a grating target. Experimental results have been obtained in conditions of relativistically strong intensity (> 10 19 W/cm 2 ) and ultrahigh contrast (10 12 ) laser pulses.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electron acceleration via ultra-intense laser interaction with structured targets

Fedeli¹,

Sgattoni²,

Cantono³

et al. 2015

SPIE Proceedings

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The generation of energetic electrons by the interaction of a short laser pulse with solid "grating" targets, having a periodic groove on the irradiated surface, has been investigated in a regime of ultrahigh contrast (10 12 ) and relativistically strong intensity (> 10 19 W/cm 2 ). A strong enhancement of both the energy and number of electrons emitted from the target, with respect to flat targets, has been observed for incidence angles close to the resonant condition for surface wave excitation. In particular we identified bunches of electrons with energies exceeding 10 MeV which are emitted in a direction close to the target surface. The experimental results are well reproduced by a three-dimensional particle-in-cell simulation, which confirms the dominant role of the surface wave in accelerating the electrons. These results are a step forward the development of high field plasmonics for a number of applications.

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Near-monochromatic high-harmonic radiation from relativistic laser–plasma interactions with blazed grating surfaces

Cited by 14 publications

References 30 publications

Extreme high field plasmonics: Electron acceleration and XUV harmonic generation from ultrashort surface plasmons

Extreme high field plasmonics: Electron acceleration and XUV harmonic generation from ultrashort surface plasmons

Directional enhancement of selected high-order-harmonics from intense laser irradiated blazed grating targets

Enhanced electron acceleration via ultra-intense laser interaction with structured targets

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