Multijoule scaling of laser-induced condensation in air

Petrarca, M.; Henin, Stefano; Stelmaszczyk, K.; Bock, Stefan; Kraft, Stephan; Schramm, U.; Vaneph, Cyril; Vogel, A.; Kasparian, Jérôme; Sauerbrey, R.; Weber, Konradin; Wöste, L.; Wolf, Jean‐Pierre

doi:10.1063/1.3646397

Cited by 19 publications

(18 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This mechanism was confirmed by the correlation between NO x , O 3 , and nanoparticle production, 19 the detection of NO 3 À ions in laser-generated particles, 12 as well as pH values down to 2 in laser-generated snowflakes in a diffusion cloud chamber. 14 Oxidized volatile organic compounds (VOCs), which are known to significantly enhance water vapor condensation in the atmosphere, 20 were more recently shown to offer an alternative pathway in the laser-induced condensation process.…”

Section: 18mentioning

confidence: 52%

“…This direct comparison confirms the previous indirect indications that a 248 nm beam of 110 fs, 11 mJ at 5 Hz 21 produces 5-10 times more particles than a 3 J, 100 TW NIR beam at 10 Hz. 19 Moreover, the effect of the focused UV laser exhibits a cooperative effect in combination with the NIR pulse. Illuminating the chamber atmosphere with the UV pulse delayed 10 ns after the NIR pulse increases the nanoparticle production by 20% as compared with the sum of the effects of the individual lasers (Figure 2(a)).…”

Section: 18mentioning

confidence: 99%

“…16 The nanoparticle production by NIR laser pulses up to the 100 TW level scales non-linearly with the incident power and energy. 19 This non-linearity is a consequence of the strong contribution from the NIR photon bath, i.e., the nonfilamenting part of the beam. Such observation opened the potential prospect to induce condensation on larger scales.…”

Section: 18mentioning

confidence: 99%

See 2 more Smart Citations

Cooperative effect of ultraviolet and near-infrared beams in laser-induced condensation

Matthews¹,

Henin²,

Pomel³

et al. 2013

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

We demonstrate the cooperative effect of near infrared (NIR) and ultraviolet (UV) beams on laser-induced condensation. Launching a UV laser after a NIR pulse yields up to a 5-fold increase in the production of nanoparticles (25-300 nm) as compared to a single NIR beam. This cooperative effect exceeds the sum of those from the individual beams and occurs for delays up to 1 ls. We attribute it to the UV photolysis of ozone created by the NIR pulses. The resulting OH radicals oxidize NO 2 and volatile organic compounds, producing condensable species. V C 2013 AIP Publishing LLC. [http://dx

show abstract

Section: 18mentioning

confidence: 52%

Section: 18mentioning

confidence: 99%

Section: 18mentioning

confidence: 99%

See 1 more Smart Citation

Cooperative effect of ultraviolet and near-infrared beams in laser-induced condensation

Matthews¹,

Henin²,

Pomel³

et al. 2013

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…The results indicate that the aerosol production scales highly non-linearly (~ I 5 ) with laser power [5], which appears very promising for large-scale applications.…”

Section: Resultsmentioning

confidence: 83%

Laser Filament Induced Water Condensation

Henin

Stelmaszczyk

Petrarca

et al. 2013

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a consequence, the photon bath effectively contributes to non-linear effects like white-light generation [32] or laser-induced condensation [33], resulting in an overall increase of the yield of these processes.…”

mentioning

confidence: 99%

Gas-Solid Phase Transition in Laser Multiple Filamentation

et al. 2017

Self Cite

View full text Add to dashboard Cite

While propagating in transparent media, near-infrared multi-terawatt (TW) laser beams break up in a multitude of filaments of typically 100-200 um diameter with peak intensities as high as 10 to 100 TW/cm 2 . We observe a phase transition at incident beam intensities of 0.4 TW/cm 2 , where the interaction between filaments induce solid-like 2-dimensional crystals with a 2.7 mm lattice constant, independent of the initial beam diameter. Below 0.4 TW/cm 2 , we evidence a mixed phase state in which some filaments are closely packed in localized clusters, nucleated on inhomogeneities (seeds) in the transverse intensity profile of the beam, and other are sparse with almost no interaction with their neighbors, similar to a gas. This analogy with a thermodynamic gas-solid phase transition is confirmed by calculating the interaction Hamiltonian between neighboring filaments, which takes into account the effect of diffraction, Kerr self-focusing and plasma generation. The shape of the effective potential is close to a Morse potential with an equilibrium bond length close to the observed value.Many physical systems are well described by statistical models driven by nearest-neighbor interactions, such as spin models [1][2][3]. Recently, we showed that the formation of multiple filamentation patterns in high-power ultrashort laser pulses also belong to this category [4,5].Laser filaments are produced in high-power, ultrashort laser pulses propagating in air or other transparent media [6][7][8] by a dynamic balance between Kerr selffocusing, and defocusing by higher-order non-linear effects including the ionization of the medium and other polarization saturation terms [9,10]. At 800 nm, this balance clamps the filaments intensity to typically 50 TW/cm 2 [11,12]. Filaments cannot be considered as virtual optical fibers guiding the light within their core: they continuously interact and exchange energy with the photon bath surrounding them [13][14][15][16]. This photon bath, also known as energy reservoir [13,17,18], plays a key role in the filamentation process. In particular, the photon bath feeds the filament and balances its energy losses, allowing it to self-heal after an obstacle [14][15][16] or extend its propagation distance [19].In the case of multifilamentation, the laser energy reservoir also mediates interactions between neighboring filaments [20][21][22][23][24][25][26]. This interaction is attractive if the filaments are in phase, and repulsive if they are in antiphase [27,28], corresponding to constructive and destructive interferences in the photon bath, respectively. Previous theoretical and experimental studies have shown that the relative phase between filaments is mainly randomly driven by intensity fluctuations during the collapse [29] and is then stabilized for the filaments propagating after the collapse [30].Recently we showed that at laser powers exceeding 100 TW, this mutual interaction limits the density of filaments in the transverse beam profile [31], resulting in the * corresponding author jean-pi...

show abstract

Multijoule scaling of laser-induced condensation in air

Cited by 19 publications

References 28 publications

Cooperative effect of ultraviolet and near-infrared beams in laser-induced condensation

Cooperative effect of ultraviolet and near-infrared beams in laser-induced condensation

Laser Filament Induced Water Condensation

Gas-Solid Phase Transition in Laser Multiple Filamentation

Contact Info

Product

Resources

About