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Coherent extreme-ultraviolet emission generated through frustrated tunnelling ionization

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Title
Coherent extreme-ultraviolet emission generated through frustrated tunnelling ionization
Author(s)
Hyeok Yun; Je Hoi Mun; Sung In Hwang; Seung Beom Park; Igor A. Ivanov; ChangHee Nam; Kyung Taec Kim
Publication Date
2018-10
Journal
Nature Photonics, v.12, no.10, pp.620 - 624
Publisher
NATURE PUBLISHING GROUP
Abstract
Coherent extreme-ultraviolet emission can be obtained through high-harmonic generation and multiphoton excitation from atoms exposed to a strong laser field. We report the generation of a new kind of coherent extreme-ultraviolet emission from He atoms excited by intense few-cycle laser pulses. An atom can be excited after tunnelling in a strong laser field, in the process known as frustrated tunnelling ionization (FTI). We find that excitation through FTI leads to coherent extreme-ultraviolet emission, and its intensity strongly depends on the ellipticity and carrier-envelope phase of the laser pulses. Additionally, the propagation direction of the emission can be coherently controlled by employing the attosecond lighthouse technique. This coherent control of tunnelling and recombination dynamics, which has provided the fundamental basis of attosecond physics, promises the utilization of FTI emission as a coherent light source and offers new opportunities in ultrafast spectroscopy. © 2018, The Author(s), under exclusive licence to Springer Nature Limited
URI
https://pr.ibs.re.kr/handle/8788114/5118
ISSN
1749-4885
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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