Figure 11
From: Effects of Geometry on the Electronic Properties of Semiconductor Elliptical Quantum Rings
Effective energy gap (photoluminescence peak energy, considering the electron-hole Coulomb correlation) for an electron-hole pair confined in an elliptical QR as a function of the aluminum concentration (x) in the barrier material, for the three different transverse profiles (triangular, parabolic and square). Results were computed for Rx1 = 20 nm and Ry1 = 15 nm. Calculations include QRs with triangular, parabolic, and squared transversal section; several values of the number of hills have been taken into account: n = 0 (solid lines), n = 2 (dashed lines), and n = 4 (dotted lines).
