TY - JOUR
T1 - Fine Structure of Highly Charged Excitons in Semiconductor Quantum Dots
AU - Urbaszek, B.
AU - Warburton, R. J.
AU - Karrai, K.
AU - Gerardot, B. D.
AU - Petroff, P. M.
AU - Garcia, J. M.
PY - 2003/6/19
Y1 - 2003/6/19
N2 - An exciton in a symmetric semiconductor quantum dot has two possible states, one dark and one bright, split in energy by the electron-hole exchange interaction. We demonstrate that for a doubly charged exciton, there are also two states split by the electron-hole exchange, but both states are now bright. We also uncover a fine structure in the emission from the triply charged exciton. By measuring these splittings, and also those from the singly charged and doubly charged biexcitons, all on the same quantum dot, we show how the various electron-hole exchange energies can be measured without having to break the symmetry of the dot.
AB - An exciton in a symmetric semiconductor quantum dot has two possible states, one dark and one bright, split in energy by the electron-hole exchange interaction. We demonstrate that for a doubly charged exciton, there are also two states split by the electron-hole exchange, but both states are now bright. We also uncover a fine structure in the emission from the triply charged exciton. By measuring these splittings, and also those from the singly charged and doubly charged biexcitons, all on the same quantum dot, we show how the various electron-hole exchange energies can be measured without having to break the symmetry of the dot.
UR - http://www.scopus.com/inward/record.url?scp=85038312923&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.90.247403
DO - 10.1103/PhysRevLett.90.247403
M3 - Article
AN - SCOPUS:85038312923
SN - 0031-9007
VL - 90
JO - Physical Review Letters
JF - Physical Review Letters
IS - 24
M1 - 247403
ER -