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Number of results
2011 | 119 | 2 | 111-113
Article title

Submillimeter-Wave Oscillations in Recessed InGaAs/InAlAs Heterostructures: Origin and Tunability

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EN
Abstracts
EN
By means of an ensemble Monte Carlo simulator, the appeareance of THz oscillations in InAlAs/InGaAs slot diodes is predicted when the applied bias exceeds the threshold for intervalley transfer. Such high frequency is attained by the presence of a Gunn-like effect in the recess-to-drain region of the device channel whose dynamics is controlled by ballistic Γp valley electrons. In this work we explain the mechanism at the origin of this effect and also the influence of the bias conditions, δ-doping, recess-to-drain distance and recess length on the frequency of the ultrafast Gunn-like oscillations. The simulations show that a minimum value for the δ-doping is necessary to have enough carrier concentration under the recess and allow the oscillations to emerge. Finally, we show that shortening the devices (small recess and recess-to-drain lengths) increases the oscillation frequency, so provides an interesting frequency tunability of this THz source.
Keywords
EN
Contributors
author
  • Dpto. Física Aplicada, Universidad de Salamanca, Plaza de la Merced s/n, 37008 Salamanca, Spain
author
  • Dpto. Física Aplicada, Universidad de Salamanca, Plaza de la Merced s/n, 37008 Salamanca, Spain
author
  • Dpto. Física Aplicada, Universidad de Salamanca, Plaza de la Merced s/n, 37008 Salamanca, Spain
References
  • 1. J. Mateos, T. González, D. Pardo, V. Hoël, A. Cappy, IEEE Trans. Electron Dev. 47, 1950 (2000)
  • 2. N. Dyakonova, A. El Fatimy, J. Łusakowski, W. Knap, M.I. Dyakonov, M.A. Poisson, E. Morvan, S. Bollaert, A. Shchepetov, Y. Roelens, Ch. Gaquiere, D. Theron, A. Cappy, Appl. Phys. Lett. 88, 141906 (2006)
  • 3. S. Pérez, T. González, D. Pardo, J. Mateos, J. Appl. Phys. 103, 094516 (2008)
  • 4. J. Mateos, T. González, D. Pardo, V. Hoel, A. Cappy, IEEE Trans. Electron. Dev. 47, 1950 (2000)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv119n205kz
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