Intense circularly polarized attosecond pulse generation from relativistic laser plasmas using few-cycle laser pulses

Ma, Guangjin; Yu, Wei; Yu, M. Y.; Shen, Baifei; Veisz, László

doi:10.1364/oe.24.010057

Cited by 26 publications

(15 citation statements)

References 33 publications

(46 reference statements)

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“…Otherwise, the combined harmonic fields should be close to linear polarization [35]. This offers an alternative way to generate CP HHG and attosecond pulses from relativistic plasmas [36][37][38]. Such radiation sources can find important applications in ultrafast measurement of chiral molecules [39] and magnetic materials [40].…”

Section: Resultsmentioning

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: Resultsmentioning

confidence: 99%

Spectral control of high harmonics from relativistic plasmas using bicircular fields

Chen

2018

Phys. Rev. E

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“…For S = 1.9 the highest amplitude is obtained for θ = 36 • , φ = 81 • and η = 0.5, where the P-polarized component is larger than the S-polarized component. For these parameters the generated pulse has duration of τ = 85 as (FWHM for intensity), ellip-ticity of ε = 0.84 and amplitude of 0.29a, which is higher than reported elsewhere [10,11]. Figure 3 illustrates the pulse train for this case.…”

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confidence: 78%

Controlling the ellipticity of attosecond pulses produced by laser irradiation of overdense plasmas

2018

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The interaction of high-intensity laser pulses and solid targets provides a promising way to create compact, tunable and bright XUV attosecond sources that can become a unique tool for a variety of applications. However, it is important to control the polarization state of this XUV radiation, and to do so in the most efficient regime of generation. Using the relativistic electronic spring (RES) model and particle-in-cell (PIC) simulations, we show that the polarization state of the generated attosecond pulses can be tuned in a wide range of parameters by adjusting the polarization and/or the angle of incidence of the laser radiation. In particular, we demonstrate the possibility of producing circularly polarized attosecond pulses in a wide variety of setups.

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“…Use of two counter-rotating circularly polarized laser fields has lead to the breakthrough of circularly polarized high harmonic [3][4][5] and isolated attosceond pulse [6] generation experimentally. Later, it was numerically demonstrated that circularly polarized XUV and attosceond pulses can also be generated via HHG from relativistic plasma surfaces [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Circularly polarized extreme ultraviolet high harmonic generation in graphene

Chen¹,

Qin²

2019

Opt. Express

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Circularly polarized extreme ultraviolet (XUV) radiation is highly interesting for investigation of chirality-sensitive light-matter interactions. Recent breakthroughs have enabled generation of such light sources via high harmonic generation (HHG) from rare gases. There is a growing interest in extending HHG medium from gases to solids, especially to 2D materials, as they hold great promise to develop ultra-compact solid-state photonic devices and provide insights into electronic properties of the materials themselves. However, HHG in graphene driven by terahertz to mid-infrared fields reported so far only generate low harmonic orders, and furthermore no harmonics driven by circularly polarized lasers. Here, using first-principles simulations within a time-dependent density-functional theory framework, we show that it is possible to generate HHG extending to the XUV spectral region in monolayer extended graphene excited by near-infrared lasers. Moreover, we demonstrate that a single circularly polarized driver is enough to ensure HHG in graphene with circular polarization. The corresponding spectra reflect the six-fold rotational symmetry of the graphene crystal. Extending HHG in graphene to the XUV spectral regime and realizing circular polarization represent an important step towards the development of novel nanoscale attosecond photonic devices and numerous applications such as spectroscopic investigation and nanoscale imaging of ultrafast chiral and spin dynamics in graphene and other 2D materials.

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Intense circularly polarized attosecond pulse generation from relativistic laser plasmas using few-cycle laser pulses

Cited by 26 publications

References 33 publications

Spectral control of high harmonics from relativistic plasmas using bicircular fields

Spectral control of high harmonics from relativistic plasmas using bicircular fields

Controlling the ellipticity of attosecond pulses produced by laser irradiation of overdense plasmas

Circularly polarized extreme ultraviolet high harmonic generation in graphene

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