Abstract
The optical properties of different quantum dot structures consisting of individual dots and pairs of coupled dots have been studied experimentally. The 7×7×7 nm3 size GaAs quantum dots form at the intersection of three orthogonal quantum wells fabricated by twofold application of the cleaved edge overgrowth method as illustrated in Fig. 1(a). The high degree of control over shape, composition and position of the dots, achievable by this technique, allows a detailed investigation of the influence of coupling between zerodimensional objects. In this way an “artifical molecule” [Fig. 1(b)] can be assembled from two of such “artificial atoms”.
© 1999 Optical Society of America
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