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Excitation of Short Electric Monopulse in Nitride Films with Negative Differential Conductivity

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Abstract

The excitation of short electric monopulses of space charge waves with wide frequency spectrum of terahertz range in nitride films has been theoretically investigated. The excitation of these pulses with duration ≤ 5 ps and high peak values of electric fields is possible in n-GaN or n-InN films of submicron thickness in the presence of negative differential conductivity. The simulation of nonlinear dynamics of pulses was performed with due regard for the nonlocal dependence of the drift electron velocity on the average electron energy. Optimal values of the applied constant electric fields and equilibrium electron concentration for excitation of monopulses are specified. The monopulse dynamics is weakly dependent on the film width and also on the value and waveform of input excitation pulses. Short electric monopulses differ from domains of strong electric field in Gunn diodes built on bulk crystals with negative differential conductivity.

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Authors and Affiliations

  1. Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico

    S. V. Koshevaya, V. V. Grimalsky, J. Escobedo-Alatorre & M. Tecpoyotl-Torres

Authors
  1. S. V. Koshevaya
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  2. V. V. Grimalsky
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  3. J. Escobedo-Alatorre
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  4. M. Tecpoyotl-Torres
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Corresponding author

Correspondence to V. V. Grimalsky.

Additional information

The authors express their gratitude to SEP-CONACyT, Mexico for support of this study.

Russian Text © The Author(s), 2019, published in Izvestiya Vysshikh Uchebnykh Zavedenii, Radioelektronika, 2019, Vol. 62, No. 6, pp. 324–334.

Conflict of Interest

The authors declare that they have no conflict of interest.

Additional Information

The initial version of this paper in Russian is published in the journal “Izvestiya Vysshikh Uchebnykh Zavedenii. Radioelektronika,” ISSN 2307-6011 (Online), ISSN 0021-3470 (Print) on the link http://radio.kpi.ua/article/view/S0021347019060025 with DOI: 10.20535/S0021347019060025.

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Koshevaya, S.V., Grimalsky, V.V., Escobedo-Alatorre, J. et al. Excitation of Short Electric Monopulse in Nitride Films with Negative Differential Conductivity. Radioelectron.Commun.Syst. 62, 262–270 (2019). https://doi.org/10.3103/S0735272719060025

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  • DOI: https://doi.org/10.3103/S0735272719060025

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