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Open AccessArticle

Investigation of Resonance-Enhanced High-Order Harmonics by Two-Component Laser-Produced Plasmas

1
GPL, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
The Institute of Optics, University of Rochester, Rochester, NY 14627, USA
*
Authors to whom correspondence should be addressed.
Received: 1 December 2020 / Revised: 29 December 2020 / Accepted: 31 December 2020 / Published: 5 January 2021
Resonance-enhanced harmonics from laser-produced plasma plumes are an interesting phenomenon, whose underlying mechanism is still under debate. In particular, it is unclear whether the macroscopic dispersion properties of the plasma are the key factors for the formation of the enhancement. To shed light on this problem, we perform experiments with two-component plasmas, in which one of the components (tin) is known to be able to generate enhanced harmonics and the other component (lead) is known for altering the overall dispersion properties of the plasma medium. We compare the harmonics spectra from the plasma of pure tin and the plasma of tin/lead alloy. Depending on the driving wavelength, we observe enhanced harmonics at around 47 or 44 nm in both types of plasmas. The two enhanced regions could be attributed to resonances in singly-charged and doubly-charged tin ions, respectively. Our results indicate that the co-existence of lead plasma does not destroy the presence of the enhanced harmonics of tin plasma, and it seems to suggest that the macroscopic properties of the plasma are not the origin of the resonance-enhanced harmonics in tin. View Full-Text
Keywords: high-order harmonic generation; mixed laser-produced plasma; resonance enhancement; two-color pump high-order harmonic generation; mixed laser-produced plasma; resonance enhancement; two-color pump
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MDPI and ACS Style

Liang, J.; Venkatesh, M.; Boltaev, G.S.; Ganeev, R.A.; Lai, Y.H.; Guo, C. Investigation of Resonance-Enhanced High-Order Harmonics by Two-Component Laser-Produced Plasmas. Atoms 2021, 9, 1. https://0-doi-org.brum.beds.ac.uk/10.3390/atoms9010001

AMA Style

Liang J, Venkatesh M, Boltaev GS, Ganeev RA, Lai YH, Guo C. Investigation of Resonance-Enhanced High-Order Harmonics by Two-Component Laser-Produced Plasmas. Atoms. 2021; 9(1):1. https://0-doi-org.brum.beds.ac.uk/10.3390/atoms9010001

Chicago/Turabian Style

Liang, Jingguang; Venkatesh, Mottamchetty; Boltaev, Ganjaboy S.; Ganeev, Rashid A.; Lai, Yu H.; Guo, Chunlei. 2021. "Investigation of Resonance-Enhanced High-Order Harmonics by Two-Component Laser-Produced Plasmas" Atoms 9, no. 1: 1. https://0-doi-org.brum.beds.ac.uk/10.3390/atoms9010001

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