High-order harmonic generation from C{sub 60}-rich plasma

Journal Article · Thu Oct 15 00:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.043808· OSTI ID:21316474

Ganeev, R A ^[1]; Elouga Bom, L B; Ozaki, T ^[1]; Wong, M C. H.; Brichta, J -P; Bhardwaj, V R ^[2]; Redkin, P V ^[3]

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1. Centre Energie, Materiaux et Telecommunications, Institut National de la Recherche Scientifique, 1650 Lionel-Boulet, Varennes, Quebec, J3X 1S2 (Canada)
2. Department of Physics, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario, K1N 6N5 (Canada)
3. Samarqand State University, Samarqand 703004 (Uzbekistan)

We performed systematic investigation of high-order harmonic generation from fullerene-rich laser-produced plasmas. We studied harmonic generation by varying several experimental parameters, such as the delay between the ablation and driving pulses, and divergence and polarization of the pump laser. Enhancement of harmonic yield is observed near 20 eV, which is attributed to the influence of a broadband plasmon resonance of C{sub 60} on the nonlinear optical response of fullerene-rich plasma. This increase in the harmonic intensity occurs despite the increased absorption by C{sub 60} at these wavelengths. Using simulations based on time-dependent density-functional theory, we confirm that this effect is due to the influence of collective excitations. We compare harmonic generation from fullerenes using lasers with 793 nm and 396 nm wavelengths, which show the influence of plasmon resonance on the conversion efficiency of high-order harmonics for different laser wavelengths.

• OSTI ID: 21316474
• Journal Information: Physical Review. A, Vol. 80, Issue 4; Other Information: DOI: 10.1103/PhysRevA.80.043808; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABLATION
ABSORPTION
COLLECTIVE EXCITATIONS
COMPARATIVE EVALUATIONS
CONVERSION
DENSITY FUNCTIONAL METHOD
EFFICIENCY
EV RANGE 10-100
FULLERENES
HARMONIC GENERATION
HARMONICS
LASER-PRODUCED PLASMA
LASERS
NONLINEAR PROBLEMS
PLASMA PRODUCTION
POLARIZATION
PULSES
RESONANCE
SIMULATION
TIME DEPENDENCE
WAVELENGTHS