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Extremely Nonperturbative Nonlinearities in GaAs Driven by Atomically Strong Terahertz Fields in Gold Metamaterials

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Lange, Christoph ; Maag, Thomas ; Hohenleutner, Matthias ; Baierl, Sebastian ; Schubert, Olaf ; Edwards, E. R. J. ; Bougeard, Dominique ; Woltersdorf, Georg ; Huber, Rupert
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Date of publication of this fulltext: 12 Dec 2014 14:22


erahertz near fields of gold metamaterials resonant at a frequency of 0.88 THz allow us to enter an extreme limit of nonperturbative ultrafast terahertz electronics: Fields reaching a ponderomotive energy in the keV range are exploited to drive nondestructive, quasistatic interband tunneling and impact ionization in undoped bulk GaAs, injecting electron-hole plasmas with densities in excess of ...


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