| Zugriffsnummer | 12435 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Spatial pattern formation of optically excited carriers in photoconductive THz antennas [poster] |
| Autor(in); Institution |
Bieler, Mark; 4.201, Femtosekunden-Messtechnik, PTB-Braunschweig
Hein, Günter; 2.41, Halbleiterstrukturen, PTB-Braunschweig
Pierz, Klaus; 2.41, Halbleiterstrukturen, PTB-Braunschweig
Siegner, Uwe; 4.201, Femtosekunden-Messtechnik, PTB-Braunschweig
Koch, M.; Technische Universität Braunschweig, Institut für Hochfrequenztechnik, Braunschweig, GERMANY
Feise, M. W.; Washington State University, Department of Physics, Washington, USA
Citrin, D. S.; Washington State University, Department of Physics, Washington, USA
|
| Quelle/Jahr | THz Conference 2000 : 8th International Conference on Terahertz Electronics:(2000), 293 - 295 |
| Availability | [CD-ROM] |
| Herausgeber(in) |
Lin, Chih-I
|
| ISBN | 3-8007-2580-0 |
| Verlag | Berlin [u.a.]: VDE-Verlag |
| Konferenzangaben | 8th International Conference on Terahertz Electronics, Darmstadt, 28-29, September, 2000, Germany |
| Zusammenfassung | We have investigated the role of spatio-temporal carrier dynamics in photoconductive THz antennas. To this end, the photoluminescence from a GaAs/AIGaAs quantum well has been spatially resolved after femtosecond laser excitation for different electric bias fields applied in the plane of the well. The photoluminescence patterns demonstrate substantially different electron-hole dynamics across the excitation laser spot. The density dependence of screening combines with the lateral variation of the carrier density to produce the observed effects. The experimental data are compared to a self-consistent calculation of the drift-diffusion equation for electrons and holes and Poisson's equation for the electric field in both space and time. Our results prove that the spatial variation of the carrier dynamics should be taken into account for further optimization of THz antennas. |
Zitierung
Bieler, M., Hein, G., Pierz, K., Siegner, U., Koch, M., Feise, M. W., & Citrin, D. S. (2000). Spatial pattern formation of optically excited carriers in photoconductive THz antennas [poster]. 8th International Conference on Terahertz Electronics, Darmstadt, 28-29, September, 2000, Germany.