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Large internal dipole moment in InGaN/GaN quantum dots

Ostapenko, Irina A.; Hönig, Gerald; Kindel, Christian; Rodt, Sven; Strittmatter, André; Hoffmann, Axel; Bimberg, Dieter

Direct observation of large permanent dipole moments of excitonic complexes in InGaN/GaN quantum dots is reported. Characteristic traces of spectral diffusion, observed in cathodoluminescence of InGaN/GaN quantum dots, allow deducing the magnitude of the intrinsic dipole moment. Our experimental results are in good agreement with realistic calculations of quantum dot transition energies for position-dependent external electric fields.
Published in: Applied Physics Letters, 10.1063/1.3477952, American Institute of Physics (AIP)
  • This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 97, 063103 (2010) and may be found at https://doi.org/10.1063/1.3477952.