1 Erratum to: Appl. Phys. A (2015) 118:511–517 DOI 10.1007/s00339-014-8854-9

The original version of this article unfortunately contained a mistake. The captions to Figs. 3 and 4 were interchanged. The correct versions are given below.

Fig. 3
figure 3

Cross-sectional TEM images of all coupled samples. The average QD heights were 9, 11, 4, and 5 nm for samples Q1, Q2, T1, and T2, respectively

Fig. 4
figure 4

Normalized room-temperature (300 K) PL spectra at an excitation power of 25 mW as a function of energy