Journal article
Attosecond spectral singularities in solid-state high-harmonic generation
Nature Photonics, Vol.14(3), pp.183-187
20/Jan/2020
Abstract
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.
Details
- Title
- Attosecond spectral singularities in solid-state high-harmonic generation
- Creators
- Ayelet Julie Uzan (null) - 972WIS_INST___89Gal Orenstein (null) - 972WIS_INST___89Alvaro Jimenez-Galan (null) - Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy (Germany, Berlin) - MBIChris McDonald (null) - University of Ottawa (Canada, Ottawa)Rui E. F. Silva (null) - Autonomous University of Madrid (Spain, Madrid) - UAMBarry D. Bruner (null) - 972WIS_INST___89Nikolai D. Klimkin (null) - Russian Quantum CenterValerie Blanchet (null) - University of Bordeaux (France, Bordeaux)Talya Arusi-Parpar (null) - 972WIS_INST___89Michael Krueger (null) - 972WIS_INST___89Alexey N. Rubtsov (null) - Russian Quantum CenterOlga Smirnova (null) - Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy (Germany, Berlin) - MBIMisha Ivanov (null) - Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy (Germany, Berlin) - MBIBinghai Yan (null) - 972WIS_INST___90Thomas Brabec (null) - University of Ottawa (Canada, Ottawa)Nirit Dudovich (Corresponding Author) - 972WIS_INST___89
- Resource Type
- Journal article
- Publication Details
- Nature Photonics, Vol.14(3), pp.183-187; 20/Jan/2020
- Number of pages
- 6
- Language
- English
- DOI
- https://doi.org/10.1038/s41566-019-0574-4
- Grant note
- N.D. is the incumbent of the Robin Chemers Neustein Professorial Chair. N.D. acknowledges financial support from the Minerva Foundation, the Israeli Science Foundation, the Crown Center of Photonics and the European Research Council. M.K. acknowledges financial support from the Minerva Foundation and the Koshland Foundation. Contributions - N.D., A.J.U. and G.O. conceived and planned the experiments. A.J.U., G.O., V.B., T.A.-P. and B.D.B. performed the measurements. A.J.U. and G.O. analysed the data. A.J.U., G.O., A.J.-G., C.M., R.E.F.S., N.D.K., M.K., A.N.R., O.S., M.I., B.Y. and T.B. developed the theoretical models and analysis. All authors discussed the results and contributed to writing the manuscript.
- Record Identifier
- 993263105103596
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