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Table 1 PL emission peak energies ascribed to QD1 and QD2 layers

From: Growth of Low-Density Vertical Quantum Dot Molecules with Control in Energy Emission

  1. The QD1 layer emission energy decreases as a function of the amount of InAs deposited. An arrow in the table accounts for this tuning effect. On the other hand, the emission energy of the second layer of nanostructures (QD2) remains almost constant for the three different structures