Use of carbon-containing materials for efficient high-order harmonic generation of laser radiation

Ganeev, R. A.; Naik, P. A.; Singhal, H.; Chakera, J. A.; Kumar, M.; Chakravarty, U.; Gupta, P. D.

doi:10.1016/j.optcom.2012.02.034

Cited by 20 publications

(8 citation statements)

References 41 publications

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“…An analogous value of conversion efficiency at approximately the same conditions was reported in [40], where the absolute measurements of harmonic efficiency from silver-containing plasma were carried out. From these estimates and relative intensities of harmonics from the plasmas produced on the bulk and cluster samples, the conversion efficiencies from small Ag-and Al-nanoparticle-containing plasmas were defined to be 6 × 10 −5 and 2 × 10 −5 , respectively.…”

Section: B Harmonic Generation From Nanoparticle-containing Plasmassupporting

confidence: 55%

Ablation of nanoparticles and efficient harmonic generation using a 1-kHz laser

et al. 2013

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We report on high-order-harmonic generation in nanoparticle-containing laser ablation plasmas using a Ti:sapphire driving laser at a repetition rate of 1 kHz and on the relation of the harmonic signals with the morphological and spectroscopic characteristics of the ablation deposits. The study of the deposits has allowed the definition of ablation conditions, leading to the generation of a plasma containing nanoparticles of similar sizes to the ones used as target material. The corresponding plasma plumes lead to efficient conversion of the IR photons towards the short-wavelength range through high-order harmonic generation and show superior performance to those corresponding to bulk targets of the same metallic element.

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Section: B Harmonic Generation From Nanoparticle-containing Plasmassupporting

confidence: 55%

Ablation of nanoparticles and efficient harmonic generation using a 1-kHz laser

et al. 2013

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“…The weak harmonics appearing from paper plasma were attributed to the presence of the carbon atoms and ions in LPP. Previously, the presence of CI and CII in carbon-containing plasma led to efficient harmonics generation in such plasma formations [23][24][25][26]. The harmonics started from H 11 and extended up to H 29 .…”

Section: Comparison Of Harmonic Emission From Different Plasmas Contamentioning

confidence: 99%

High-Order Harmonic Generation in Au Nanoparticle-Contained Plasmas

et al. 2020

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Gold nanoparticles (NPs) have a wide range of applications in various fields. Here, we present high-order nonlinear optical studies of the plasmas produced from ablation of Au bulk targets and Au NP films deposited on paper and glass substrates. Experimentally, we analyze high-order harmonic generation (HHG) from gold NPs-containing plasmas. The HHG is produced by 35-fs pulses at 800 and 400 nm, while the plasmas are produced by femtosecond (35 fs, 800 nm), picosecond (200 ps, 800 nm), and nanosecond (5 ns, 1064 nm) pulses, respectively. High-order harmonics produced from ablated Au NPs on paper were 40 times stronger than the HHG from that ablated from the Au bulk targets. Through molecular dynamic simulations, we investigate the formation of gold NPs during laser ablation of a metal surface under different conditions.

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“…A part of the uncompressed laser beam of ∼20 mJ energy and pulse duration ∼200 ps was taken out before the laser pulse compressor stage using a beam splitter (BS). This laser beam (∼200 ps) was focused onto a solid target (carbon) surface using a 500 mm focal length lens, to an intensity of ∼10 10 W cm −2 [5] to form a plasma plume. The focal spot size of prepulse beam on target surface was kept to be ∼600 μm.…”

Section: Harmonic Generation Detection and Spatial Coherence Measurementmentioning

confidence: 99%

“…For example, in an indium plasma plume, an enhancement of ∼×200 has been reported for the 13th harmonic [1]. Recently, the harmonic generation from graphite plume is found to be promising for high generation efficiency of mid order harmonics [5]. Although, the efficiency of range of the harmonics, generated in the graphite plume was similar to that observed from indium [5], still there is a quest to increase the harmonic yield (HY) and conversion efficiency (CE) for application of this source.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of conversion efficiency and spatial coherence of high order harmonics generated from pre-formed plasma plumes using an apertured laser beam

Kumar¹,

Chakravarty²,

Rathore³

et al. 2016

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

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The effect of laser beam aperturing (Ti: sapphire laser; 800 nm, 45 fs) on the conversion efficiency (CE), harmonic yield and spatial coherence of high order harmonics generated from a low excited plasma plume of carbon (neutral and singly charged ions) is studied. The optimization of CE by varying the aperture size in combination with different laser and plasma plume parameters was carried out. The CE of the 15th harmonic is enhanced from ∼10−7 for an unapertured laser beam to ∼10−6 for ∼¼ times the unapertured beam diameter, at same laser energy in both cases. Further, it was found that, at a given aperture size, there is an optimum prepulse intensity for maximum CE. The results are explained by taking into account the theoretical consideration of phase matching issues in plasma plumes. The study shows that tuning the prepulse intensity and aperture size gives an easy handle to increase the harmonic conversion along with its coherence properties. The study will be useful for producing an intense source of harmonics with high spatial coherence from plasmas plumes for applications.

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Use of carbon-containing materials for efficient high-order harmonic generation of laser radiation

Cited by 20 publications

References 41 publications

Ablation of nanoparticles and efficient harmonic generation using a 1-kHz laser

Ablation of nanoparticles and efficient harmonic generation using a 1-kHz laser

High-Order Harmonic Generation in Au Nanoparticle-Contained Plasmas

Enhancement of conversion efficiency and spatial coherence of high order harmonics generated from pre-formed plasma plumes using an apertured laser beam

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