Generation of an attosecond X-ray pulse in a thin film irradiated by an ultrashort ultrarelativistic laser pulse

Mikhailova, Yu. M.; Platonenko, V. T.; Rykovanov, S. G.

doi:10.1134/1.2029946

Cited by 38 publications

(12 citation statements)

References 8 publications

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“…However, the flux and photon energy of attosecond pulses generated with the use of this technology are limited [12]. Recent insight into ultrafast laser-plasma interactions [13][14][15][16][17][18][19][20][21] offers the potential for much higher yields and photon energies by combining advanced concepts of ultrafast optical science and relativistic plasma physics.…”

mentioning

confidence: 99%

“…Formation of attosecond pulses in the relativistic regime has been numerically and analytically studied in [16][17][18].…”

mentioning

confidence: 99%

“…The time interval during which the electron velocity is orthogonal to the acceleration and parallel to the z axis is confined to a small fraction of a laser cycle. Therefore, in this case the synchrotron emission, well known in physics [29] for its high intensity and high-energy spectrum, manifests itself in the form of ultrashort bursts and can form an isolated attosecond pulse, e.g., when the laser pulse consists of just a few cycles or when an ultrathin foil is used as a target [17].…”

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confidence: 99%

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Isolated Attosecond Pulses from Laser-Driven Synchrotron Radiation

et al. 2012

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A quantitative theory of attosecond pulse generation in relativistically driven overdense plasma slabs is presented based on an explicit analysis of synchrotron-type electron trajectories. The subcycle, field-controlled release, and subsequent nanometer-scale acceleration of relativistic electron bunches under the combined action of the laser and ionic potentials give rise to coherent radiation with a high-frequency cutoff, intensity, and radiation pattern explained in terms of the basic laws of synchrotron radiation. The emerging radiation is confined to time intervals much shorter than the half-cycle of the driver field. This intuitive approach will be instrumental in analyzing and optimizing few-cycle-laser-driven relativistic sources of intense isolated extreme ultraviolet and x-ray pulses.

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confidence: 99%

“…Formation of attosecond pulses in the relativistic regime has been numerically and analytically studied in [16][17][18].…”

mentioning

confidence: 99%

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confidence: 99%

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Isolated Attosecond Pulses from Laser-Driven Synchrotron Radiation

et al. 2012

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“…Such schemes rely on suppressing the harmonic production in all but one optical half cycle, for example by utilizing pulses with a complex polarization state [20,24].…”

Section: Attosecond Pulse Production and Harmonic Beam Intensitymentioning

confidence: 99%

High harmonics from relativistically oscillating plasma surfaces—a high brightness attosecond source at keV photon energies

Zepf¹,

Dromey²,

Kar³

et al. 2007

Plasma Phys. Control. Fusion

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An intense laser pulse interacting with a near discontinuous plasma vacuum interface causes the plasma surface to perform relativistic oscillations. The reflected laser radiation then contains very high order harmonics of fundamental frequency and-according to current theory-must be bunched in radiation bursts of a few attoseconds duration. Recent experimental results have demonstrated x-ray harmonic radiation extending to 3.3 Å (3.8 keV, order n > 3200) with the harmonic conversion efficiency scaling as η(n) n −2.5 over the entire observed spectrum ranging from 17 nm to 3.3 Å. This scaling holds up to a maximum order, n RO 8 1/2 γ 3 , where γ is the peak value of the Lorentz factor, above which the harmonic efficiency decreases more rapidly. The coherent nature of the generated harmonics is demonstrated by the highly directional beamed emission, which for photon energy hν > 1 keV is found to be into a cone angle ∼4 • , significantly less than that of the incident laser cone (20 • ).

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“…In the present paper, we consider laser irradiation of ultra-thin (nm) foils [14,15,16,17] at intensities high enough to separate all electrons from ions. The electrons then move with the front of the laser pulse, forming a dense relativistic electron layer.…”

Section: Introductionmentioning

confidence: 99%

Coherent Thomson backscattering from laser-driven relativistic ultra-thin electron layers

Meyer‐ter‐Vehn

2009

Eur. Phys. J. D

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The generation of laser-driven dense relativistic electron layers from ultra-thin foils and their use for coherent Thomson backscattering is discussed, applying analytic theory and one-dimensional particlein-cell simulation. The blow-out regime is explored in which all foil electrons are separated from ions by direct laser action. The electrons follow the light wave close to its leading front. Single electron solutions are applied to initial acceleration, phase switching, and second-stage boosting. Coherently reflected light shows Doppler-shifted spectra, chirped over several octaves. The Doppler shift is found ∝ γ 2 x = 1/(1 − β 2 x ), where βx is the electron velocity component in normal direction of the electron layer which is also the direction of the driving laser pulse. Due to transverse electron momentum py, the Doppler shift by 4γ 2 x = 4γ 2 /(1 + (py/mc) 2 ) ≈ 2γ is significantly smaller than full shift of 4γ 2 . Methods to turn py → 0 and to recover the full Doppler shift are proposed and verified by 1D-PIC simulation. These methods open new ways to design intense single attosecond pulses.PACS. 41.75.Jv Laser-driven acceleration, -52.38.-f Intense particle beams and radiation sources in physics of plasmas, -52.59.Ye Plasma devices for generation of coherent radiation

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Generation of an attosecond X-ray pulse in a thin film irradiated by an ultrashort ultrarelativistic laser pulse

Cited by 38 publications

References 8 publications

Isolated Attosecond Pulses from Laser-Driven Synchrotron Radiation

Isolated Attosecond Pulses from Laser-Driven Synchrotron Radiation

High harmonics from relativistically oscillating plasma surfaces—a high brightness attosecond source at keV photon energies

Coherent Thomson backscattering from laser-driven relativistic ultra-thin electron layers

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