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Directed Currents Generated at THz Frequencies Are Higher Than Current Clock Rates

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BERLIN, Jan. 16, 2019 — Researchers at the Max Born Institute (MBI) generated directed electric currents at terahertz (THz) frequencies from light absorbed in semiconductor crystals. According to the researchers, this is a much higher frequency than the clock rates of current electronics. They showed that the underlying mechanism for this phenomenon is the electronic charge transfer between neighboring atoms in the crystal lattice. (a) Unit cell of the semiconductor gallium arsenide (GaAs). Chemical bonds (blue) connect every Ga atom to four neighboring As atoms and vice versa. Valence electron density in the...Read full article

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