Light Filaments without Self-Channeling

Dubietis, A.; Gaižauskas, E.; Tamošauskas, G.; Trapani, P. Di

doi:10.1103/physrevlett.92.253903

Cited by 181 publications

(131 citation statements)

References 22 publications

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“…In the case of the non-linear ring-Airy beam, the ring is sustained by the combination of the pre-organized energy flux from the tail to the main lobe of the Airy profile 12,13 and light coming from the non-linear focus, diffracted by the generated plasma. In the case of the Gaussian beam, the ring is generated by a spontaneous transformation of the Gaussian beam into a Bessel-like beam induced by non-linear effects 22 and featured by conical emission 23 . This type of non-linear ring formation depends on the multiphoton order of the non-linear absorption and is discussed in details in the case of two-photon absorption in ref.…”

Section: Resultsmentioning

confidence: 99%

Sharply autofocused ring-Airy beams transforming into non-linear intense light bullets

et al. 2013

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Controlling the propagation of intense optical wavepackets in transparent media is not a trivial task. During propagation, low-and high-order non-linear effects, including the Kerr effect, multiphoton absorption and ionization, lead to an uncontrolled complex reshaping of the optical wavepacket that involves pulse splitting, refocusing cycles in space and significant variations of the focus. Here we demonstrate both numerically and experimentally that intense, abruptly autofocusing beams in the form of accelerating ring-Airy beams are able to reshape into non-linear intense light-bullet wavepackets propagating over extended distances, while their positioning in space is extremely well defined. These unique wavepackets can offer significant advantages in numerous fields such as the generation of high harmonics and attosecond physics or the precise micro-engineering of materials.

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Section: Resultsmentioning

confidence: 99%

Sharply autofocused ring-Airy beams transforming into non-linear intense light bullets

et al. 2013

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“…Most of the beam energy is contained in the feet which feed the core. The consequence of this property is the ability of the energy reservoir to regenerate the filament core when it happens to be extinguished, even by a central stopper [21,22,41,49,58]. The filament therefore persists over several tenths of Rayleigh lengths, a process that does not need any external guiding such as a fiber and that has been called for this reason a self-guided propagation.…”

Section: Plasma Generation By Optical Field Ionizationmentioning

confidence: 98%

“…The electrons are generated mainly by multiphoton ionization, an effect which occurs over time scales of a few fs and involves only a fraction of the energy of a mJ pulse. Once triggered, multiphoton absorption, a highly nonlinear process, immediately depletes the intensity peaks which has two consequences: it stops the energy absorption until new intense peak are generated and it can even drive an energy flux refilling the intense peaks from the low intensity reservoir [21,22,24,41,49,58]. For ultrashort pulses, multiphoton absorption therefore occurs in steps of small amount of energy.…”

Section: Introductionmentioning

confidence: 99%

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Femtosecond Filamentation in Air

Couairon

Mysyrowicz

2006

Springer Series in Chemical Physics

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“…Recently [12] we have shown that light filaments in water do not behave as soliton-like beams, but they spread after being clipped by an aperture and reconstruct themselves after being blocked by a stopper, as expected for genuine conical waves [13]. Here we concentrate our attention in the beam-periphery structure in order to demonstrate that filaments are indeed conical and, more precisely, NL-UBB waves.…”

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confidence: 99%

Nonlinear Unbalanced Bessel Beams: Stationary Conical Waves Supported by Nonlinear Losses

et al. 2004

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Nonlinear losses accompanying self-focusing substantially impacts the dynamic balance of diffraction and nonlinearity, permitting the existence of localized and stationary solutions of the 2D+1 nonlinear Schrödinger equation which are stable against radial collapse. These are featured by linear, conical tails that continually refill the nonlinear, central spot. An experiment shows that the discovered solution behaves as strong attractor for the self-focusing dynamics in Kerr media.PACS numbers: 42.65. Re, 42.65.Tg One of the main goals of modern nonlinear wave physics is the achievement of wave localization, stationarity and stability. While in a one-dimensional geometry (e.g., in optical fibers), nonlinearity suitably balances linear wave dispersion, leading to the soliton regime, in the multidimensional case, nonlinearity drives waves either to collapse or instability. In self-focusing of optical beams, for instance, many stabilizing mechanisms, such as Kerr saturation, plasma-induced defocusing, or stimulated Raman scattering, have been explored, and are being the subject of intense debate, mainly in the context of light filamentation in air or condensed matter [1]. These mechanisms, however, are either intrinsically lossy, or, due to the huge intensities involved, are accompanied by losses, which lead ultimately to the termination of any soliton regime. Similar pictures can be traced in all phenomena commonly discussed in the context of the nonlinear Schrödinger equation (NLSE), as Bose-Einstein condensates (BEC) or Langmuir waves in plasma [2]. Nonlinear losses (NLL) arise in BEC from two-and three-body inelastic recombination, and as the natural mechanism for energy dissipation in Langmuir turbulence [3].The question then arises of whether any stationary and localized (SL) wave propagation is possible in the presence of NLL. The response, as shown in this Letter, is affirmative. These SL waves cannot be ascribed to the class of solitary waves, but are instead nonlinear conical waves (as the non-linear X waves [4]) of dissipative type, whose stationarity is sustained by a continuous refilling of the nonlinearly absorbed central spot with the energy supplied by linear, conical tails. These waves are not only robust against NLL, but find their stabilizing mechanism against perturbations in NLL themselves.Among the linear conical waves [5], the simplest one is the monochromatic Bessel beam (BB) [6], made of a superposition of plane waves whose wave vectors are evenly distributed over the surface of a cone, resulting in a nondiffracting transversal Bessel profile. Despite the ideal nature of BBs (they carry infinite power), they not only have revealed to be a paradigm for understanding wave phenomena, but also have found applications as diverse as in frequency conversion, or in atom trapping and alignment [7]. Of particular interest for us is the finding [8] that the BB is describable in terms of the interference of two conical Hankel beams [5], carrying equal amounts of energy towards and outwards the beam ...

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Light Filaments without Self-Channeling

Cited by 181 publications

References 22 publications

Sharply autofocused ring-Airy beams transforming into non-linear intense light bullets

Sharply autofocused ring-Airy beams transforming into non-linear intense light bullets

Femtosecond Filamentation in Air

Nonlinear Unbalanced Bessel Beams: Stationary Conical Waves Supported by Nonlinear Losses

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