Uzan AJ, Orenstein G, Jimenez-Galan A, Mcdonald C, Silva REF, Bruner BD, Klimkin ND, Blanchet V, Arusi-Parpar T, Kruger M, Rubtsov AN, Smirnova O, Ivanov M, Yan B, Brabec T, Dudovich N (2020)
Publication Type: Journal article
Publication year: 2020
Book Volume: 14
Pages Range: 183-187
Journal Issue: 3
DOI: 10.1038/s41566-019-0574-4
Strong-field-driven electric currents in condensed-matter systems are opening new frontiers in petahertz electronics. In this regime, new challenges are arising as the roles of band structure and coherent electron–hole dynamics have yet to be resolved. Here, by using high-harmonic generation spectroscopy, we reveal the underlying attosecond dynamics that dictates the temporal evolution of carriers in multi-band solid-state systems. We demonstrate that when the electron–hole relative velocity approaches zero, enhanced constructive interference leads to the appearance of spectral caustics in the high-harmonic generation spectrum. We introduce the role of the dynamical joint density of states and identify its mapping into the spectrum, which exhibits singularities at the spectral caustics. By studying these singularities, we probe the structure of multiple unpopulated high conduction bands.
APA:
Uzan, A.J., Orenstein, G., Jimenez-Galan, A., Mcdonald, C., Silva, R.E.F., Bruner, B.D.,... Dudovich, N. (2020). Attosecond spectral singularities in solid-state high-harmonic generation. Nature Photonics, 14(3), 183-187. https://doi.org/10.1038/s41566-019-0574-4
MLA:
Uzan, Ayelet Julie, et al. "Attosecond spectral singularities in solid-state high-harmonic generation." Nature Photonics 14.3 (2020): 183-187.
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