Signatures of transient Wannier-Stark localization in bulk gallium arsenide

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2018
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Podzimski, Reinold
Berghoff, Daniel
Meier, Torsten
Schmidt, Wolf Gero
Reichl, Christian
Wegscheider, Werner
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European Union (EU): 290876
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Ultrafast Quantum Physics in Amplitude and Phase - UltraPhase, ERC Advanced Grant
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Nature Communications. 2018, 9(1), 2890. eISSN 2041-1723. Available under: doi: 10.1038/s41467-018-05229-x
Zusammenfassung

Many properties of solids result from the fact that in a periodic crystal structure, electronic wave functions are delocalized over many lattice sites. Electrons should become increasingly localized when a strong electric field is applied. So far, this Wannier-Stark regime has been reached only in artificial superlattices. Here we show that extremely transient bias over the few-femtosecond period of phase-stable mid-infrared pulses may localize electrons even in a bulk semiconductor like GaAs. The complicated band structure of a three-dimensional crystal leads to a strong blurring of field-dependent steps in the Wannier-Stark ladder. Only the central step emerges strongly in interband electro-absorption because its energetic position is dictated by the electronic structure at an atomic level and therefore insensitive to the external bias. In this way, we demonstrate an extreme state of matter with potential applications due to e.g., its giant optical non-linearity or extremely high chemical reactivity.

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ISO 690SCHMIDT, Christian, Johannes BÜHLER, Alexander-Cornelius HEINRICH, Jonas ALLERBECK, Reinold PODZIMSKI, Daniel BERGHOFF, Torsten MEIER, Wolf Gero SCHMIDT, Christian REICHL, Werner WEGSCHEIDER, Daniele BRIDA, Alfred LEITENSTORFER, 2018. Signatures of transient Wannier-Stark localization in bulk gallium arsenide. In: Nature Communications. 2018, 9(1), 2890. eISSN 2041-1723. Available under: doi: 10.1038/s41467-018-05229-x
BibTex
@article{Schmidt2018-07-23Signa-42940,
  year={2018},
  doi={10.1038/s41467-018-05229-x},
  title={Signatures of transient Wannier-Stark localization in bulk gallium arsenide},
  number={1},
  volume={9},
  journal={Nature Communications},
  author={Schmidt, Christian and Bühler, Johannes and Heinrich, Alexander-Cornelius and Allerbeck, Jonas and Podzimski, Reinold and Berghoff, Daniel and Meier, Torsten and Schmidt, Wolf Gero and Reichl, Christian and Wegscheider, Werner and Brida, Daniele and Leitenstorfer, Alfred},
  note={Article Number: 2890}
}
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