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Magnetotransport in quantum cascade detectors: analyzing the current under illumination.

Jasnot FR, Péré-Laperne N, de Vaulchier LA, Guldner Y, Carosella F, Ferreira R, Buffaz A, Doyennette L, Berger V, Carras M, Marcadet X - Nanoscale Res Lett (2011)

Bottom Line: The interpretation of the experimental data supports the idea that an elastic scattering contribution plays a central role in the behavior of those structures.We present a calculation of electron lifetime versus magnetic field which suggests that impurities scattering in the active region is the limiting factor.These experiments lead to a better understanding of these complex structures and give key parameters to optimize them further.

View Article: PubMed Central - HTML - PubMed

Affiliation: Laboratoire Pierre Aigrain, Ecole Normale Supérieure CNRS (UMR 8551), 24 rue Lhomond, 75231 Paris Cedex 05, France. louis-anne.devaulchier@lpa.ens.fr.

ABSTRACT
Photocurrent measurements have been performed on a quantum cascade detector structure under strong magnetic field applied parallel to the growth axis. The photocurrent shows oscillations as a function of B. In order to describe that behavior, we have developed a rate equation model. The interpretation of the experimental data supports the idea that an elastic scattering contribution plays a central role in the behavior of those structures. We present a calculation of electron lifetime versus magnetic field which suggests that impurities scattering in the active region is the limiting factor. These experiments lead to a better understanding of these complex structures and give key parameters to optimize them further.

No MeSH data available.


Related in: MedlinePlus

Comparison between experimental data and electron-ionized impurities scattering time as a function of B. (a) Ilight as a function of the magnetic field where the background has been subtracted. (b) Ionized impurity scattering  under magnetic field between /up〉 and /down〉 levels. (c) Ionized impurity scattering  under magnetic field between /up〉 and levels in the cascade. (d) QE calculated with Equation (1).
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Figure 3: Comparison between experimental data and electron-ionized impurities scattering time as a function of B. (a) Ilight as a function of the magnetic field where the background has been subtracted. (b) Ionized impurity scattering under magnetic field between /up〉 and /down〉 levels. (c) Ionized impurity scattering under magnetic field between /up〉 and levels in the cascade. (d) QE calculated with Equation (1).

Mentions: Figure 3 represents a comparison between experimental data and electron-ionized impurities scattering time as a function of magnetic field. Figure 3b, c shows the two lifetimes involved in Equation 1 as a function of B calculated with electron-ionized impurities scattering. Figure 3d shows the calculation of the related quantum efficiency.


Magnetotransport in quantum cascade detectors: analyzing the current under illumination.

Jasnot FR, Péré-Laperne N, de Vaulchier LA, Guldner Y, Carosella F, Ferreira R, Buffaz A, Doyennette L, Berger V, Carras M, Marcadet X - Nanoscale Res Lett (2011)

Comparison between experimental data and electron-ionized impurities scattering time as a function of B. (a) Ilight as a function of the magnetic field where the background has been subtracted. (b) Ionized impurity scattering  under magnetic field between /up〉 and /down〉 levels. (c) Ionized impurity scattering  under magnetic field between /up〉 and levels in the cascade. (d) QE calculated with Equation (1).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211262&req=5

Figure 3: Comparison between experimental data and electron-ionized impurities scattering time as a function of B. (a) Ilight as a function of the magnetic field where the background has been subtracted. (b) Ionized impurity scattering under magnetic field between /up〉 and /down〉 levels. (c) Ionized impurity scattering under magnetic field between /up〉 and levels in the cascade. (d) QE calculated with Equation (1).
Mentions: Figure 3 represents a comparison between experimental data and electron-ionized impurities scattering time as a function of magnetic field. Figure 3b, c shows the two lifetimes involved in Equation 1 as a function of B calculated with electron-ionized impurities scattering. Figure 3d shows the calculation of the related quantum efficiency.

Bottom Line: The interpretation of the experimental data supports the idea that an elastic scattering contribution plays a central role in the behavior of those structures.We present a calculation of electron lifetime versus magnetic field which suggests that impurities scattering in the active region is the limiting factor.These experiments lead to a better understanding of these complex structures and give key parameters to optimize them further.

View Article: PubMed Central - HTML - PubMed

Affiliation: Laboratoire Pierre Aigrain, Ecole Normale Supérieure CNRS (UMR 8551), 24 rue Lhomond, 75231 Paris Cedex 05, France. louis-anne.devaulchier@lpa.ens.fr.

ABSTRACT
Photocurrent measurements have been performed on a quantum cascade detector structure under strong magnetic field applied parallel to the growth axis. The photocurrent shows oscillations as a function of B. In order to describe that behavior, we have developed a rate equation model. The interpretation of the experimental data supports the idea that an elastic scattering contribution plays a central role in the behavior of those structures. We present a calculation of electron lifetime versus magnetic field which suggests that impurities scattering in the active region is the limiting factor. These experiments lead to a better understanding of these complex structures and give key parameters to optimize them further.

No MeSH data available.


Related in: MedlinePlus