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

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

Y. Nabekawa, T. Okino, K. Midorikawa

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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.

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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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