Attosecond electron spectroscopy using a novel interferometric pump-probe technique
| Autor: | Mauritsson, J., Remetter, T., Swoboda, M., Klunder, K., L'Huillier, A., Schafer, K. J., Ghafur, O., Kelkensberg, F., Siu, W., Johnsson, P., Vrakking, M. J. J., Znakovskaya, I., Uphues, T., Zherebtsov, S., Kling, M. F., Lepine, F., Benedetti, E., Ferrari, F., Sansone, G., Nisoli, M. |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 105, 053001 (2010) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.105.053001 |
| Popis: | We present an interferometric pump-probe technique for the characterization of attosecond electron wave packets (WPs) that uses a free WP as a reference to measure a bound WP. We demonstrate our method by exciting helium atoms using an attosecond pulse with a bandwidth centered near the ionization threshold, thus creating both a bound and a free WP simultaneously. After a variable delay, the bound WP is ionized by a few-cycle infrared laser precisely synchronized to the original attosecond pulse. By measuring the delay-dependent photoelectron spectrum we obtain an interferogram that contains both quantum beats as well as multi-path interference. Analysis of the interferogram allows us to determine the bound WP components with a spectral resolution much better than the inverse of the attosecond pulse duration. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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