High-Order Harmonic Generation in Atom Clusters

Donnelly, Thomas D.; Ditmire, T.; Neuman, Keir C.; Perry, M. D.; Falcone, R. W.

doi:10.1103/physrevlett.76.2472

Cited by 294 publications

(138 citation statements)

References 21 publications

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“…Much research effort is being devoted to improving the yield of EUV radiation so that sufficient emission around 13.5 nm, the wavelength of choice for this application, can be generated [4]. Apart from incoherent radiation, clusters have shown promise as a source for high-harmonic generation, wherein extremely non-linear processes result in the emission of coherent radiation at large multiples of the laser frequency [5]. The interaction of laser pulses from tabletop lasers with deuterium and deuterium-rich clusters has also made it possible to study hot-plasma fusion in small facilities, which was hitherto restricted to very large national facilities [6].…”

Section: Introductionmentioning

confidence: 99%

Explosions of water clusters in intense laser fields

2003

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Energetic, highly-charged oxygen ions, O q+ (q ≤ 6), are copiously produced upon laser field-induced disassembly of highly-charged water clusters, (H 2 O) n and (D 2 O) n , n ∼ 60, that are formed by seeding high-pressure helium or argon with water vapor. Ar n clusters (n∼40000) formed under similar experimental conditions are found undergo disassembly in the Coulomb explosion regime, with the energies of Ar q+ ions showing a q 2 dependence. Water clusters, which are argued to be considerably smaller in size, should also disassemble in the same regime, but the energies of fragment O q+ ions are found to depend linearly on q which, according to prevailing wisdom, ought to be a signature of hydrodynamic expansion that is expected of much larger clusters. The implication of these observations on our understanding of the two cluster explosion regimes, Coulomb explosion and hydrodynamic expansion, is discussed. Our results indicate that charge state dependences of ion energy do not constitute an unambiguous experimental signature of cluster explosion regime.

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Section: Introductionmentioning

confidence: 99%

Explosions of water clusters in intense laser fields

2003

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“…A large effort has been devoted to increasing the photon number. Early studies have mostly concentrated on optimization with respect to atomic or molecular gases (see, for example, [4][5][6][7][8][9]), and to the laser wavelength [4,10], thus addressing mostly the single-atom emission. Lompré et al pointed out the importance of using a loose focusing geometry [11].…”

Section: Introductionmentioning

confidence: 99%

Influence of the medium length on high-order harmonic generation

Delfin¹,

Altucci

Fabbri

et al. 1999

J. Phys. B: At. Mol. Opt. Phys.

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Influence of the medium length on high-order harmonic generationDelfin, C; Altucci, C; De Filippo, F; de Lisio, C; Gaarde, Mette; Lhuillier, A; Roos, L; Wahlström, Claes-Göran Link to publication Citation for published version (APA): Delfin, C., Altucci, C., De Filippo, F., de Lisio, C., Gaarde, M., L'Huillier, A., ... Wahlström, C-G. (1999). Influence of the medium length on high-order harmonic generation. Journal of Physics B: Atomic, Molecular and Optical Physics, 32(22), 5397-5409. DOI: 10.1088/0953-4075/32/22/316 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Influence of the medium length on high-order harmonic generation Influence of the medium length on high-order harmonic generation Abstract. We study high-order harmonic generation using a 110 fs Ti:sapphire laser loosely focused into a variable-length gas cell filled with neon or argon at 5 mbar pressure. The harmonic intensity is recorded as a function of the medium length, varying between 2 and 21 mm. Several cases are examined, the 17th and the 29th harmonic in argon, and the 29th and 51st harmonic in neon, at the same intensity 4 × 10 14 W cm −2 . We find that the length which maximizes the harmonic yield varies from 10 mm to more than 20 mm. We discuss the different effects affecting the photon yield of the high-order harmonics.

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“…Small sized nanostructures are an attractive approach, since they exhibit local-field-induced enhancement of the nonlinear optical response of the medium [41][42][43]. Another mechanism that can enhance harmonic efficiency of clusters is the increase of the recombination cross section of accelerated electron and parent particle in the final step of the three-step mechanism of HHG [44].…”

Section: Fullerenes Using Few-and Multi-cycl Pulses Of Different Wavementioning

confidence: 99%

New Approaches in Frequency Conversion of Laser Radiation in Plasma Plumes

Ganeev¹

2013

OPJ

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Recent studies of plasma harmonic generation are reviewed. We show the advances of this technique for generation of coherent ultrashort pulses in the extreme ultraviolet range. Among the achievements highlighted in this review are the comparative experimental and theoretical studies of high-order harmonic generation in silver plasma, isolated subfemtosecond pulse generation in Mn plasma ablation, stable generation of high-order harmonics of femtosecond laser radiation from laser produced plasma plumes at 1 kHz pulse repetition rate, and high-order harmonic generation in fullerenes using few-and multi-cycle pulses of different wavelengths. We show that new developments of plasma harmonic studies can lead to the creation of an attractive field of laser ablation induced high-order harmonic generation spectroscopy.

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High-Order Harmonic Generation in Atom Clusters

Cited by 294 publications

References 21 publications

Explosions of water clusters in intense laser fields

Explosions of water clusters in intense laser fields

Influence of the medium length on high-order harmonic generation

New Approaches in Frequency Conversion of Laser Radiation in Plasma Plumes

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