Macroscopic aspects of attosecond pulse generation

Gaarde, Mette B.; Tate, J.; Schafer, Kenneth J.

doi:10.1088/0953-4075/41/13/132001

Cited by 354 publications

(327 citation statements)

References 132 publications

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“…4(a) and 4(c), respectively] the main contributions come from regions near the cutoff but may now be identified as corresponding to long (PBB case) and short paths (SLP case). We also directly verified that the angular spread (data not shown) in the PBB case is slightly larger (0.81 mrad) with respect to the SLP case (0.73 mrad), in keeping with the standard observation that contributions from long trajectories exhibit a larger divergence with respect to short trajectory contributions [19].…”

supporting

confidence: 85%

“…Our model is adapted from that of Refs. [19,20] and relies on a unidirectional propagation equation along the z direction for the frequency componentsẼ(r, z, ω) of the electric field E(r, z, t) of the laser pulse and of the harmonic field generated by the pulse…”

mentioning

confidence: 99%

“…Its implementation strictly follows Ref. [19]. Dispersion of the pump field is calculated by mean of the formula given in [23], while dispersion and absorption for the harmonic field come from the interpolation of the data given in [24].…”

mentioning

confidence: 99%

“…4(b)] the portions of the spectrum corresponding to the temporal peaks fall in the region around the cutoff. These regions come from both short-and long-path contributions [19]. In the PBB and SLP case [ Fig.…”

mentioning

confidence: 99%

“…This in turn determines different signs for the dipole phase contribution term for the different cases [32]. By adopting the sign convention of [19], we may isolate each contribution to the phase matching for the harmonic field generation. The geometric term is always positive for both PBB and SLP, since the effective pump wavevector on axis is shortened in CWs [33][34][35].…”

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confidence: 99%

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Multielectron High Harmonic Generation: Simple Man on a Complex Plane

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Ivanov

2014

Attosecond and XUV Physics

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IntroductionAttosecond science has emerged with the discovery of coherent electron-ion collisions induced by a strong laser field, usually referred to as "recollisions" [1]. This discovery was initiated by the numerical experiments of K. Schafer, J. Krause and K. Kulander (see [2]). The work [1] drew on the concepts developed by F. Brunel and colleagues [3][4][5]. It has also been predated by the concept of the "atomic antenna" [6] developed by M. Kuchiev. With the benefit of hindsight, we now see the "atomic antenna" [6] as the earliest quantum counterpart of the classical picture developed by [1,7]. 1)The classical picture of strong-field-induced ionization dynamics is summarized as follows. Once ionization removes an electron from an atom or a molecule, this electron finds itself in the strong oscillating laser field. Newton's equations of motion show that, within one or a few cycles after ionization, the oscillating electron can be driven back by the laser field to reencounter the parent ion. During this reencounter, referred to as recollision, the electron can do many things: scatter elastically (diffract), scatter inelastically (excitation or ionization of the parent ion), or radiatively recombine with the ion. It is this latter process that we will focus on here. The classical picture is usually referred to as the three-step model, or the simple man model. 2) 1) While the quantum vision of [6] has predated the classical picture, at that time it lacked the striking clarity and transparency of the classical model [1], which linked several key -and seemingly disparate -strong-field phenomena, like high harmonic generation, production of very high-energy electrons, and extreme efficiency of double ionization. The history of this discovery and of its impact on nonlinear optics and technology are rich and interesting in their own right. Some of it is recounted, from a more historical perspective, in Chapter 10. Our purpose here is different -we simply urge the reader to read the papers [3-6, 8], as well as a seemingly unrelated paper [9]. 2) As far as one of us (M.I.) can remember, the latter term has been used by K. Kulander, K. Schafer and H.-G. Muller, who have largely contributed to the development of this classical model. Attosecond and XUV Physics, First Edition. Edited by Thomas Schultz and Marc Vrakking.

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Macroscopic aspects of attosecond pulse generation

Cited by 354 publications

References 132 publications

Carrier-envelope shearing and isolated attosecond pulse generation

Carrier-envelope shearing and isolated attosecond pulse generation

Femtosecond and Attosecond Light Sources and Techniques for Spectroscopy

Multielectron High Harmonic Generation: Simple Man on a Complex Plane

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