| Zugriffsnummer | 29664 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | All-optically induced currents resulting from frequency-modulated coherent polarization |
| Autor(in); Institution |
Priyadarshi, Shekhar; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Pierz, Klaus; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Bieler, Mark; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
|
| Quelle/Jahr | Applied Physics Letters: 102 (2013), 11, 112102-1 - 112102-5 |
| ISSN | 0003-6951 (PRINT) ; 1077-3118 (ONLINE) |
| DOI | |
| Verlag | Melville, NY: American Institute of Physics |
| Klassifikationscode | PACS: 71.35.-y ; PACS: 72.40.+w ; PACS: 78.67.De ; PACS: 78.47.da ; PACS: 68.65.Fg |
| Zusammenfassung | We employ polarization-shaped ultrafast optical pulses to generate photocurrents, which only arise if the optically induced coherent polarization is frequency modulated. This frequency modulation is obtained via detuned excitation of light-hole excitons in (110)-oriented GaAs quantum wells. The observed photocurrents vanish for resonant excitation of excitons and reverse their direction with a change of the sign of detuning. Moreover, the currents do not exist for continuous-wave excitation. Our work reveals the existence of a new class of photocurrents and visualizes the complexity of current response tensors. This is helpful for the better understanding of optically induced microscopic transport in semiconductors. |
