Abstract
We report polarized photoluminescence excitation spectroscopy of the negative trion in single charge-tunable InAs/GaAs quantum dots. The spectrum exhibits a p-shell resonance with polarized fine structure arising from the direct excitation of the electron spin triplet states. The energy splitting arises from the axially symmetric electron-hole exchange interaction. The magnitude and sign of the polarization are understood from the spin character of the triplet states and a small amount of quantum dot asymmetry, which mixes the wave functions through asymmetric e-e and e-h exchange interactions.
Published in:
Physical Review Letters 95,17 (2005) 177403;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevLett.95.177403
Keywords
relaxation;; trion
Date of Version
January 2005
Recommended Citation
Ware, M. E.; Stinaff, E. A.; Gammon, D.; Doty, M. F.; Bracker, A. S.; Gershoni, D.; Korenev, V. L.; Badescu, S. C.; Lyanda-Geller, Y.; and Reinecke, T. L., "Polarized fine structure in the photoluminescence excitation spectrum of a negatively charged quantum dot" (2005). Department of Physics and Astronomy Faculty Publications. Paper 248.
https://docs.lib.purdue.edu/physics_articles/248