Alexander Markus

Postdoctoral Scientist, EPFL Institute of Photonics and Quantum Electronics

Alexander Markus is a postdoctoral scientist at Ecole Polytechnique Fédérale de Lausanne (EPFL)’s Institute of Photonics and Quantum Electronics (Lausanne, Switzerland).

FIGURE 1. Atomic-force microscopy shows a QD array (InAs on GaAs) for emission at 1300 nm (left). Schematic diagram of conduction band of a single QD, simplified for clarity, shows only two sets of energy levels: 'ground state' (GS) and 'excited state' (ES), analogous to the atomic s and p shells (right).

QUANTUM-DOT SOURCES: Quantum-dot development pursues new applications

Jan. 1, 2006
Despite limited gain and modulation response, quantum dots offer several advantages as optical sources for telecommunications and other industrial applications.