| Zugriffsnummer | 28641 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | All-optically induced ultrafast currents: Beyond the continuous-wave limit [poster] |
| 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 | Physica Status Solidi C: 10 (2013), 9, 1250 - 1254 |
| ISSN | 1610-1634 (PRINT) ; 1610-1642 (ONLINE) |
| DOI | |
| Verlag | Weinheim: Wiley-VCH |
| Konferenzangaben | Nonlinear Optics and Excitation Kinetics in Semiconductors, 2012, Stuttgart, 23-27, September, 2012, Germany |
| Freie Schlagworte | linear-photogalvanic currents ; shift currents ; non-instantaneous coherent polarization ; symmetric and antisymmetric tensor elements |
| Zusammenfassung | We observe a new type of optically induced linear-photogalvanic current in GaAs quantum wells which only exists if the linear polarization of the excitation pulse slowly rotates versus time and if the response of the coherent polarization is non-instantaneous. The current vanishes in the continuous-wave limit. Microscopically, it results from a phase mismatch of two orthogonal transition dipole moments. Macroscopically, the current can be linked to an antisymmetric tensor element and, thus, it is different than previously known linear-photogalvanic currents which are linked to symmetric tensor elements. Our observations of asymmetric response tensors provide the possibility for simultaneous coherent control of commutative and anticommutative operations with respect to two time-delayed pulses. |
