Giant permanent dipole moments of excitons in semiconductor nanostructures

R. J. Warburton, C. Schulhauser, D. Haft, C. Schäflein, K. Karrai, J. M. Garcia, W. Schoenfeld, P. M. Petrofft

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Abstract

We have measured the vertical Stark effect of excitons confined to individual self-assembled ring-shaped quantum dots. We find that the excitons have very large permanent dipole moments corresponding to electronhole separations up to 2.5 nm, comparable to the nanostructures' physical height. We find a trend of both permanent dipole moment and polarizability on the emission energy, but a very strong correlation between the permanent dipole moment and the polarizability.

Original languageEnglish
Article number113303
Pages (from-to)1133031-1133034
Number of pages4
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume65
Issue number11
Publication statusPublished - 15 Mar 2002

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    Warburton, R. J., Schulhauser, C., Haft, D., Schäflein, C., Karrai, K., Garcia, J. M., Schoenfeld, W., & Petrofft, P. M. (2002). Giant permanent dipole moments of excitons in semiconductor nanostructures. Physical Review B: Condensed Matter and Materials Physics, 65(11), 1133031-1133034. [113303].