The advent of ultrafast laser science offers the unique opportunity to combine Floquet engineering with extreme time resolution, further pushing the optical control of matter into the petahertz domain. However, what is the shortest driving pulse for which Floquet states can be realised remains an unsolved matter, thus limiting the application of Floquet theory to pulses composed by many optical cycles. Here we ionized Ne atoms with few-femtosecond pulses of selected time duration and show that a Floquet state can be observed already with a driving field that lasts for only 10 cycles. For shorter pulses, down to 2 cycles, the finite lifetime of the driven state can still be explained using an analytical model based on Floquet theory. By demonstrating that the amplitude and number of Floquet-like sidebands in the photoelectron spectrum can be controlled not only with the driving laser pulse intensity and frequency, but also by its duration, our results add a new lever to the toolbox of Floquet engineering.

Lucchini, M., Medeghini, F., Wu, Y., Vismarra, F., Borrego-Varillas, R., Crego, A., et al. (2022). Controlling Floquet states on ultrashort time scales. NATURE COMMUNICATIONS, 13(1), 7103 [10.1038/s41467-022-34973-4].

Controlling Floquet states on ultrashort time scales

De Giovannini, Umberto;
2022-11-19

Abstract

The advent of ultrafast laser science offers the unique opportunity to combine Floquet engineering with extreme time resolution, further pushing the optical control of matter into the petahertz domain. However, what is the shortest driving pulse for which Floquet states can be realised remains an unsolved matter, thus limiting the application of Floquet theory to pulses composed by many optical cycles. Here we ionized Ne atoms with few-femtosecond pulses of selected time duration and show that a Floquet state can be observed already with a driving field that lasts for only 10 cycles. For shorter pulses, down to 2 cycles, the finite lifetime of the driven state can still be explained using an analytical model based on Floquet theory. By demonstrating that the amplitude and number of Floquet-like sidebands in the photoelectron spectrum can be controlled not only with the driving laser pulse intensity and frequency, but also by its duration, our results add a new lever to the toolbox of Floquet engineering.
19-nov-2022
Lucchini, M., Medeghini, F., Wu, Y., Vismarra, F., Borrego-Varillas, R., Crego, A., et al. (2022). Controlling Floquet states on ultrashort time scales. NATURE COMMUNICATIONS, 13(1), 7103 [10.1038/s41467-022-34973-4].
File in questo prodotto:
File Dimensione Formato  
Controlling Floquet states on ultrashort time scales_1.pdf

accesso aperto

Tipologia: Versione Editoriale
Dimensione 2.13 MB
Formato Adobe PDF
2.13 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/574988
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 13
social impact