Probing attosecond dynamics of molecules by an intense a-few-pulse attosecond pulse train

Y. Nabekawa; T. Okino; K. Midorikawa

doi:10.1117/12.2268983

20 February 2017 Probing attosecond dynamics of molecules by an intense a-few-pulse attosecond pulse train

Y. Nabekawa, T. Okino, K. Midorikawa

Proceedings Volume 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics; 103280B (2017) https://doi.org/10.1117/12.2268983
Event: 31st International Congress on High-Speed Imaging and Photonics, 2016, Osaka, Japan

Abstract

The advent of coherent high-harmonic pulses in the extreme-ultraviolet (XUV) wavelength region generated from an intense femtosecond near-infrared pulse has made it possible to observe the ultrafast dynamics of matter with a time scale of less than 1 femtosecond, which is conventionally called the 'attosecond' time scale. The mainstream of this kind of study is based on pump-probe measurement, in which an XUV attosecond pump/probe pulse should always be accompanied by an intense near-infrared probe/pump laser pulse because the intensity of an XUV attosecond pulse is usually too low to be utilized for attosecond-pump and attosecond-probe measurements. In contrast, we have aimed at generating an intense attosecond pulse to realize such measurements, and we have developed an XUV harmonic beam line with a pulse energy of more than 1 μJ, which is sufficient for interacting with matter in both pump and probe pulses, even though the temporal profile exhibits a train of attosecond pulses in a few-fs train envelope. In this presentation, we introduce our studies on the attosecond electronic dynamics and 10-fs nuclear dynamics in diatomic molecules, which cannot be observed without using our XUV harmonic beam line.

Citation Download Citation

Y. Nabekawa, T. Okino, and K. Midorikawa "Probing attosecond dynamics of molecules by an intense a-few-pulse attosecond pulse train", Proc. SPIE 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics, 103280B (20 February 2017); https://doi.org/10.1117/12.2268983

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