Abstract
A magnetic circular dichroism (MCD) measurement is utilized to investigate confined states in direct (CuCl, and CdSxSe1-x) and indirect gap (Si) semiconductor quantum dots (QD's). CuCl and CdSxSe1-x QD's belong to the weak and intermediate confinement regimes, leading to contrastive response to a magnetic field. In CuCl QD's, the enhancement of g-value is observed due to the mixing of the relative and the center-of-mass motions, while (p, P)type transition is observed in CdSxSe1-x QD's. In Si QD's confined states with direct as well as indirect nature are observed that confirms the quantum confinement effects in Si QD's.
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