Polarization gating using cross-polarized wave generation with multicycle lasers to produce isolated attosecond pulses in overdense media

Cambronero-López, F.; Blanco, María del Pilar; Ruiz, Camilo; Flores-Arias, M. T.; Bao-Varela, Carmen

doi:10.1364/josab.34.000843

Cited by 3 publications

(2 citation statements)

References 41 publications

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“…This thus provides a powerful radiation source in the extreme ultraviolet and x-ray spectral region with attosecond duration. While many an investigation has been carried out to control the temporal structure of the harmonics, e.g., to obtain an isolated single attosecond pulse [10][11][12][13], methods to control the HHG spectrum remain limited. Among the reported spectral control schemes, selected enhancement of HHG has been achieved by modifying the plasma density ramp [14] or plasma surface morpha [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Spectral control of high harmonics from relativistic plasmas using bicircular fields

Chen

2018

Phys. Rev. E

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We introduce two-color counterrotating circularly polarized laser fields as a way to spectrally control high harmonic generation (HHG) from relativistic plasma mirrors. Through particle-in-cell simulations, we show that only a selected group of harmonic orders can appear owing to the symmetry of the laser fields and the related conservation laws. By adjusting the intensity ratio of the two driving field components, we demonstrate the overall HHG efficiency, the relative intensity of allowed neighboring harmonic orders, and that the polarization state of the harmonic source can be tuned. The HHG efficiency of this scheme can be as high as that driven by a linearly polarized laser field.

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Section: Introductionmentioning

confidence: 99%

Spectral control of high harmonics from relativistic plasmas using bicircular fields

Chen

2018

Phys. Rev. E

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“…Some applications require the use of a single pulse [12][13][14], therefore techniques to isolate a single ultrashort pulse have been developed over the years. In solid media, the isolation techniques rely on several methods, namely: the intensity gating method [30], based on the fact that the most intense ultrashort pulses are associated with the most intense oscillations of the laser pulse; the polarization gating method [6,[31][32][33], consisting on the use of laser pulses with a time-dependent polarization state; the attosecond lighthouse [34][35][36] that uses pulses with a tilted wavefront to generate each attosecond pulse of the train in a different direction and therefore isolate them. In gas media there are similar mechanisms to obtain also isolated attosecond pulses [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Frequency gating to isolate single attosecond pulses with overdense plasmas using particle-in-cell simulations

Blanco¹,

Flores-Arias²

2017

Opt. Express

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We present the isolation of single attosecond pulses for multi-cycle and few-cycle laser pulses from high harmonic generation in overdense plasmas, calculated with particle-in-cell simulations. By the combination of two laser pulses of equal amplitude and a small frequency shift between them, we demonstrate that it is possible to shorten the region in which the laser pulse is most intense, therefore restricting the generation of high harmonic orders in the form of attosecond pulses to a narrower time window. The creation of this window is achieved due to the combination of the laser pulse envelope and the slow oscillating wave obtained from the coherent sum of the two pulses. A parametric scan, performed with particle-in-cell simulations, reveals how the pulse isolation behaves for different input laser pulse lengths and which are the optimal frequency shifts between the two laser pulses in each case, giving the conditions for having a good isolation of an attosecond pulse when working with laser-plasma interaction in overdense targets.

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Isolated attosecond pulse in the water window from many-cycle laser-driven plasma mirrors without pulse engineering

Chen

2018

Opt. Lett.

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High-order harmonic generation from relativistic laser-driven plasma mirrors is an attractive route to produce highly energetic attosecond pulses in the extreme ultraviolet to x-ray regime. To achieve an isolated attosecond pulse (IAP) driven by many-cycle intense laser pulses, pulse engineering techniques such as polarization modulation and wavefront rotation, are usually needed. Here we show that it is possible to generate an IAP without pulse engineering. Through particle-in-cell simulations, it is found that plasma mirrors can be rapidly heated and deformed in a relatively long preplasma regime. Intense IAP in the high-frequency spectral region is given rise once when the mirror parameters are suitable. The results may offer a new route to generate a bright IAP source for various applications such as bio-imaging and electronic dynamic studies.

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Polarization gating using cross-polarized wave generation with multicycle lasers to produce isolated attosecond pulses in overdense media

Cited by 3 publications

References 41 publications

Spectral control of high harmonics from relativistic plasmas using bicircular fields

Spectral control of high harmonics from relativistic plasmas using bicircular fields

Frequency gating to isolate single attosecond pulses with overdense plasmas using particle-in-cell simulations

Isolated attosecond pulse in the water window from many-cycle laser-driven plasma mirrors without pulse engineering

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