Abstract

Lightwave-field-induced ultrafast electric dipole oscillation is promising for realizing petahertz (1015 Hz: PHz) signal processing in the future. In building the ultrahigh-clock-rate logic operation system, one of the major challenges will be petahertz electron manipulation accompanied with multiple frequencies. Here we study multi-petahertz interference with electronic dipole oscillations in alumina with chromium dopant (Cr:Al2O3). An intense near-infrared lightwave-field induces multiple electric inter-band polarizations, which are characterized by Fourier transform extreme ultraviolet attosecond spectroscopy. The interference results from the superposition state of periodic dipole oscillations of 667 to 383 attosecond (frequency of 1.5 to 2.6 PHz) measured by direct time-dependent spectroscopy and consists of various modulations on attosecond time scale through individual electron dephasing times of the Cr donor-like and Al2O3 conduction band states. The results indicate the possible manipulation of petahertz interference signal with multiple dipole oscillations using material band engineering and such a control will contribute to the study of ultrahigh-speed signal operation.

Details

Title
Multi-petahertz electron interference in Cr:Al2O3 solid-state material
Author
Mashiko, Hiroki 1   VIAFID ORCID Logo  ; Chisuga, Yuta 2 ; Katayama, Ikufumi 3 ; Oguri, Katsuya 1 ; Masuda, Hiroyuki 2 ; Takeda, Jun 3   VIAFID ORCID Logo  ; Gotoh, Hideki 1 

1  NTT Basic Research Laboratories, Atsugi, Kanagawa, Japan 
2  NTT Basic Research Laboratories, Atsugi, Kanagawa, Japan; Department of Physics, Graduate School of Engineering, Yokohama National University, Hodogaya, Yokohama, Japan 
3  Department of Physics, Graduate School of Engineering, Yokohama National University, Hodogaya, Yokohama, Japan 
Pages
1-6
Publication year
2018
Publication date
Apr 2018
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-018-03885-7
ProQuest document ID
2027021165
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.