Multi-petahertz electron interference in Cr:Al2O3 solid-state material

Lightwave-field-induced ultrafast electric dipole oscillation is promising for realizing petahertz (10 15  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 multi...

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Bibliographic Details
Published in:Nature communications 2018-04, Vol.9 (1), p.1-6, Article 1468
Main Authors: Mashiko, Hiroki, Chisuga, Yuta, Katayama, Ikufumi, Oguri, Katsuya, Masuda, Hiroyuki, Takeda, Jun, Gotoh, Hideki
Format: Article
Language:English
Subjects:
140/125
639/766/36/2796
639/766/400
Aluminum oxide
Chromium
Conduction
Conduction bands
Data processing
Electric dipoles
Electrons
Fourier transforms
Humanities and Social Sciences
I.R. radiation
Interference
multidisciplinary
Oscillations
Science
Science (multidisciplinary)
Signal processing
Spectroscopy
Spectrum analysis
Superposition (mathematics)
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Summary:Lightwave-field-induced ultrafast electric dipole oscillation is promising for realizing petahertz (10 15  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:Al 2 O 3 ). 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 Al 2 O 3 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. Signal processing in electronic devices is in the THz regime. Here the authors measure NIR lightwave-field-induced multiple dipole oscillations in Cr:Al 2 O 3 in the time domain reaching PHz scale by using an isolated attosecond pulse and this method shows potential for higher speed signal processing.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-018-03885-7