Ballistic transport in semiconductor nanostructures: From quasi-classical 
oscillations to novel THz-emitters

Doehler, G. H.; Eckardt, M.; Schwanhaeusser, A.; Renner, F.; Malzer, S.; Trumm, S.; Betz, M.; Sotier, F.; Leitenstorfer, A.; Loata, G.; Loeffler, T.; Roskos, H.; Mueller, T.; Unterrainer, K.; Driscoll, D.; Hanson, M.; Gossard, A. C.

doi:10.1007/s12043-006-0050-9

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Ballistic transport in semiconductor nanostructures: From quasi-classical oscillations to novel THz-emitters

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Doehler, G. H.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Malzer, S.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Doehler, G. H., Eckardt, M., Schwanhaeusser, A., Renner, F., Malzer, S., Trumm, S., et al. (2006). Ballistic transport in semiconductor nanostructures: From quasi-classical oscillations to novel THz-emitters. PRAMANA-JOURNAL OF PHYSICS, 67(1), 199-205.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6D92-8

Abstract

By suitable design it is possible to achieve quasi-ballistic transport in semiconductor nanostructures over times up to the ps-range. Monte-Carlo simulations reveal that under these conditions phase-coherent real-space oscillations of an electron ensemble, generated by fs-pulses become possible in wide potential wells. Using a two-color pump-and-probe technique we have been able to observe this new phenomenon in excellent agreement with the theoretical predictions. Apart from its fundamental significance, ballistic transport in nanostructures can also be used for high-efficiency coherent THz-sources. The concept of these THz-emitters and its experimental confirmation will also be presented.