Experimental observation of the ground-state biexciton transition in CdSₓ{Se}_{1{{-}}x}$ quantum dots in glass is presented in a three-beam experiment, involving a probe, a pump, and a saturating laser pulse. The observed quantum-dot biexciton ground state has a strongly enhanced binding energy compared to the bulk as theoretically predicted. The biexciton binding energy is measured as a function of quantum-dot size and the results are compared with calculations.
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Kang et al. (1993) studied this question.
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