Limit to Concentration by Focusing

Bassett, I.M.

doi:10.1080/713821943

Cited by 45 publications

(51 citation statements)

References 4 publications

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“…In free space there is a fundamental limit to the optimal concentration of electromagnetic energy [45]. To understand how this gives rise to an upper bound for V, we assume that E inc is a focused plane wave of amplitude E o .…”

Section: Coherent Scattering Under Focusingmentioning

confidence: 99%

Light scattering under nanofocusing: Towards coherent nanoscopies

Mohammadi

Agio

2012

Optics Communications

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We investigate light scattering under nanofocusing in the context of coherent spectroscopy. We discuss the different mechanisms that may enhance the signal in extinction and how these depend on nanofocusing as well as on the probed system. We find that nanofocusing may improve the detection sensitivity by orders of magnitude under realistic conditions, enabling scanning implementations of coherent spectroscopy at the nanoscale.

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Section: Coherent Scattering Under Focusingmentioning

confidence: 99%

Light scattering under nanofocusing: Towards coherent nanoscopies

Mohammadi

Agio

2012

Optics Communications

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“…Note that it turns out that this setup allows one to approach very closely the theoretical limit of focusing which was discussed in Refs. [27,28,29].…”

Section: Pair Creation By Laser Field In Vacuummentioning

confidence: 99%

Creation of electron-positron plasma with superstrong laser field

Narozhny

Fedotov

2014

Eur. Phys. J. Spec. Top.

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Abstract. We present a short review of recent progress in studying QED effects of interaction of ultrarelativistic laser pulses with vacuum and e − e + plasma. The development of laser technologies promises very rapid growth of laser intensities in close future already. Two exawatt class facilities (ELI and XCELS, Russia) in Europe are already in the planning stage. Realization of these projects will make available a laser of intensity ∼ 10 26 W/cm 2 or even higher. Therefore, discussion of nonlinear optical effects in vacuum are becoming urgent for experimentalists and are currently gaining much attention. We show that, in spite of the fact that the respective field strength is still essentially less than ES = m 2 c 3 /e = 1.32 · 10 16 V/cm, the nonlinear vacuum effects will be accessible for observation at ELI and XCELS facilities. The most promissory for observation is the effect of pair creation by laser pulse in vacuum. It is shown, that at intensities ∼ 5·10 25 W/cm 2 , creation even of a single pair is accompanied by development of an avalanchelike QED cascade. There exists an important distinctive feature of the laser-induced cascades, as compared with the air showers arising due to primary cosmic ray entering the atmosphere. In our case the laser field plays not only the role of a target (similar to a nucleus in the case of air showers). It is responsible also for acceleration of slow particles. It is shown that the effect of pair creation imposes a natural limit for attainable laser intensity. Apparently, the field strength E ∼ ES is not accessible for pair creating electromagnetic field at all.PACS. 42.50.Ct Quantum description of interaction of light and matter; related experiments -12.20.Ds Specific calculations -52.27.Ep Electron-positron plasmas

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“…For a large number of beams there is a diffraction constraint on the electric field amplitude in the focus region. In the limit N → ∞ the electromagnetic field can be approximated by the three-dimensional dipole configurations (see Bulanov et al 2010a) for which the electric field maximum is given by (Bassett 1986) E m = 8π P las 3cλ 2 , (1.1)…”

Section: S V Bulanov and Othersmentioning

confidence: 99%

Charged particle dynamics in multiple colliding electromagnetic waves. Survey of random walk, Lévy flights, limit circles, attractors and structurally determinate patterns

et al. 2017

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The multiple colliding laser pulse concept formulated by Bulanov et al. (Phys. Rev. Lett., vol. 104, 2010b, 220404) is beneficial for achieving an extremely high amplitude of coherent electromagnetic field. Since the topology of electric and magnetic fields of multiple colliding laser pulses oscillating in time is far from trivial and the radiation friction effects are significant in the high field limit, the dynamics of charged particles interacting with the multiple colliding laser pulses demonstrates remarkable features corresponding to random walk trajectories, limit circles, attractors, regular patterns and Lévy flights. Under extremely high intensity conditions the nonlinear dissipation mechanism stabilizes the particle motion resulting in the charged particle trajectory being located within narrow regions and in the occurrence of a new class of regular patterns made by the particle ensembles.

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Limit to Concentration by Focusing

Cited by 45 publications

References 4 publications

Light scattering under nanofocusing: Towards coherent nanoscopies

Light scattering under nanofocusing: Towards coherent nanoscopies

Creation of electron-positron plasma with superstrong laser field

Charged particle dynamics in multiple colliding electromagnetic waves. Survey of random walk, Lévy flights, limit circles, attractors and structurally determinate patterns

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