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

• DOI: 10.1038/s41467-018-03885-7
• Publication Date: 2018-04-11T14:19:57Z
• Authors: Hiroki Mashiko; Yuta Chisuga; Ikufumi Katayama; Katsuya Oguri; Hiroyuki Masuda; Jun Takeda; Hideki Gotoh
• Keywords: Attosecond; Dephasing; Oscillation (cell signaling)

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