Temporal and spectral evolution of an interrupted virtual single-photon transition: creation of optical gain and loss
| Autor: | Ursula Keller, Matthias Weger, P. Rivière, Jan-Michael Rost, Mazyar Sabbar, Jens Herrmann, Ulf Saalmann, Reto Locher, Lukas Gallmann |
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| Přispěvatelé: | Chergui, Majed, Taylor, Antoinette, Cundiff, Steve, de Vivie-Riedle, Regina, Yamanouchi, Kaoru |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | EPJ Web of Conferences, Vol 41, p 02024 (2013) EPJ Web of Conferences, 41 |
| ISSN: | 2100-014X 2101-6275 |
| DOI: | 10.3929/ethz-b-000061895 |
| Popis: | We examine the optical response of a virtual dipole transition of a quantum mechanical two-level system (TLS). In the case of off-resonant excitation the time-integrated dipole response (TIDR) is expected to be zero, which corresponds to transparency of the system with respect to the exciting pulse. Our new time-frequency representation reveals that even for a zero TIDR there are positive and negative contributions included in the response. Furthermore, we present a way to access these contributions by using a second electromagnetic field, which interrupts the temporal evolution of the dipole response. The theoretical results are confirmed by attosecond transient absorption spectroscopy in helium (He). EPJ Web of Conferences, 41 ISSN:2100-014X ISSN:2101-6275 ISBN:978-2-7598-0956-1 |
| Databáze: | OpenAIRE |
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