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Temporal response of the optically generated electric field in InAs/GaAs coupled quantum dots

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Abstract

Coupled quantum dots (CQDs) can provide a sensitive probe of the electric field within a device. With non-resonant excitation above the wetting layer (WL) energy, optical generation of an electric field within the CQD structure was observed. By alternating this non-resonant excitation the temporal response of the optically generated electric field was measured. Decay of this field was measured to be on the order of 110-140 μsec whereas the onset of the optically generated electric field was observed to be less than the temporal resolution of our experiment (7.5 μsec). This may provide a means for fast, non-contact, electric field modulation techniques.

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Authors and Affiliations

  1. Department of Physics and Astronomy and Nanoscale and Quantum Phenomena Institute, Ohio University, 45701-2979, Athens, OH, USA

    C. Wijesundara Kushal, Mauricio Garrido, Swati Ramanathan & E. A. Stinaff

  2. Naval Research Laboratory, 20375, Washington, DC, USA

    A. S. Bracker & D. Gammon

Authors
  1. C. Wijesundara Kushal
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  2. Mauricio Garrido
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  3. Swati Ramanathan
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  4. E. A. Stinaff
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  5. A. S. Bracker
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  6. D. Gammon
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Kushal, C.W., Garrido, M., Ramanathan, S. et al. Temporal response of the optically generated electric field in InAs/GaAs coupled quantum dots. MRS Online Proceedings Library 1208, 502 (2009). https://doi.org/10.1557/PROC-1208-O05-02

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  • DOI: https://doi.org/10.1557/PROC-1208-O05-02

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