Linear and ultrafast optical spectroscopy in the regime of the quantum Hall effect (2008)
Brooks, K.-B., Su, B., Schröter, P., Heyn, Ch., Heitmann, D., Wegscheider, Werner, ...
We review our optical experiments on two-dimensional electron systems (2DES) of different mobilities, realized in modulation-doped GaAs-AlGaAs single quantum wells, in quantizing magnetic fields. The...
One-dimensional plasmons in magnetic fields (1997)
Ulrichs, E., Biese, G., Steinebach, C., Schüller, Christian, Heitmann, D.
We have investigated the wave-vector (q) and magnetic-field (B) dependence of plasmons propagating along quantum wires by means of resonant Raman spectroscopy. We observe a mode with a...
Single-particle excitations and many-particle interactions in quantum wires and dots (1996)
Schüller, Christian, Biese, G., Keller, K., Steinebach, C., Heitmann, D., Grambow, P., ...
We have investigated electronic excitations in GaAs-AlxGa1-xAs quantum wires, and dots by resonance Raman spectroscopy. We find for quantum dots and quantum wires three types of excitations;...
Steinebach, C., Krahne, Roman, Biese, G., Schüller, Christian, Heitmann, D., Eberl, Karl
We have investigated experimentally and theoretically electronic Raman excitations in GaAs-AlxGa1-xAs quantum wires in magnetic fields. In both the experiments and the calculations we find strong...
Cyclotron resonance in an antidot array measured by microwave photoconductivity (1995)
Vasiliadou, E, Fleischmann, R, Weiss, Dieter, Heitmann, D, Klitzing, K, Geisel, T, ...
A lateral antidot array with a lattice period of 400 nm fabricated with electron- beam lithography on GaAs/AlxGa1-xAs heterostructures was investigated by microwave photoconductivity....
Collective Response in the Microwave Photoconductivity of Hall Bar Structures (1993)
Vasiliadou, E, Müller, G, Heitmann, D, Weiss, Dieter, Klitzing, K, Nickel, H, ...
We have investigated the microwave photoconductivity of 100-ìm- and 50-ìm-wide Hall bars fabricated from GaAs/AlxGa1-xAs heterostructures. We found resonant responses at frequencies fres with...
Optical properties of excitons in GaAs quantum wires (1993)
Rinaldi, R., Cingolani, R., Ferrara, M., Marti, U., Martin, D., Reinhart, F., ...
We report the result of a detailed spectroscopic investigation of the optical properties of excitons in rectangular (etched) and V-shaped (grown on non-planar substrates) GaAs quantum wires. High...
Two-photon absorption in low-dimensional heterostructures (1993)
Cingolani, R., Lepore, M., Tommasi, R., Catalano, I., Lage, H., Heitmann, D., ...
We briefly review the physics of two-photon absorption processes in low-dimensional systems. The anisotropic selection rules of the multiphoton absorption in quantum wells and quantum wires are...
Optical properties of excitons in GaAs quantum wires (1993)
Rinaldi, R., Cingolani, R., Ferrara, M., Marti, U., Martin, D., Reinhart, F., ...
We report the result of a detailed spectroscopic investigation of the optical properties of excitons in rectangular (etched) and V-shaped (grown on non-planar substrates) GaAs quantum wires. High...
Two-photon absorption in low-dimensional heterostructures (1993)
Cingolani, R., Lepore, M., Tommasi, R., Catalano, I., Lage, H., Heitmann, D., ...
We briefly review the physics of two-photon absorption processes in low-dimensional systems. The anisotropic selection rules of the multiphoton absorption in quantum wells and quantum wires are...