Dynamics of the in-plane charge separation front in a two-dimensional electron-hole gas

Gang Chen; Ronen Rapaport; Steven H. Simon; Loren Pfeiffer; Ken West

doi:10.1103/PhysRevB.71.041301

Dynamics of the in-plane charge separation front in a two-dimensional electron-hole gas

Gang Chen^*, Ronen Rapaport, Steven H. Simon, Loren Pfeiffer, Ken West

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We show both experimentally and theoretically that the recently observed optically induced in-plane charge separation in quantum well (QW) structures and the exciton ring emission pattern at this charge separation boundary have an extremely long lifetime. The oppositely charged carriers remain separated and provide a reservoir of excitons at their boundary with a persistent emission which lasts hundreds of microseconds (orders of magnitude longer than their recombination time) after the external excitation is removed. This long lifetime is due to an interplay between the slow in-plane carrier diffusion and slow carrier tunneling perpendicular to the QW plane.

Original language	English
Article number	041301
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	71
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.71.041301
State	Published - Jan 2005
Externally published	Yes

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abstract = "We show both experimentally and theoretically that the recently observed optically induced in-plane charge separation in quantum well (QW) structures and the exciton ring emission pattern at this charge separation boundary have an extremely long lifetime. The oppositely charged carriers remain separated and provide a reservoir of excitons at their boundary with a persistent emission which lasts hundreds of microseconds (orders of magnitude longer than their recombination time) after the external excitation is removed. This long lifetime is due to an interplay between the slow in-plane carrier diffusion and slow carrier tunneling perpendicular to the QW plane.",

author = "Gang Chen and Ronen Rapaport and Simon, {Steven H.} and Loren Pfeiffer and Ken West",

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AU - Pfeiffer, Loren

AU - West, Ken

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N2 - We show both experimentally and theoretically that the recently observed optically induced in-plane charge separation in quantum well (QW) structures and the exciton ring emission pattern at this charge separation boundary have an extremely long lifetime. The oppositely charged carriers remain separated and provide a reservoir of excitons at their boundary with a persistent emission which lasts hundreds of microseconds (orders of magnitude longer than their recombination time) after the external excitation is removed. This long lifetime is due to an interplay between the slow in-plane carrier diffusion and slow carrier tunneling perpendicular to the QW plane.

AB - We show both experimentally and theoretically that the recently observed optically induced in-plane charge separation in quantum well (QW) structures and the exciton ring emission pattern at this charge separation boundary have an extremely long lifetime. The oppositely charged carriers remain separated and provide a reservoir of excitons at their boundary with a persistent emission which lasts hundreds of microseconds (orders of magnitude longer than their recombination time) after the external excitation is removed. This long lifetime is due to an interplay between the slow in-plane carrier diffusion and slow carrier tunneling perpendicular to the QW plane.

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JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Dynamics of the in-plane charge separation front in a two-dimensional electron-hole gas

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