Nonlinear photoelectric emission from metals induced by a laser radiation

Anisimov, S. I.; Benderskiĭ, V. A.; Farkas, Gy.

doi:10.1070/pu1977v020n06abeh005404

Cited by 64 publications

(30 citation statements)

References 2 publications

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“…The bias-voltage dependence (Fig. 21c) also shows that the electrons are generated from a short-lived non-equilibrium carrier distribution function [115][116][117][118][119][120][121] and that different parts of this distribution function are emitted depending on the bias voltage. The generation mechanism changes from one-photon-assisted tunneling at high bias voltages to four-photon-induced emission at zero bias.…”

Section: A Nanometer-sized Femtosecond Electron Source Based On Opticmentioning

confidence: 90%

Ultra‐fast nano‐optics

Vasa

Ropers

Pomraenke

et al. 2009

Laser & Photonics Reviews

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Ultra-fast nano-optics is a comparatively young and rapidly growing field of research aiming at probing, manipulating and controlling ultrafast optical excitations on nanometer length scales. This ability to control light on nanometric length and femtosecond time scales opens up exciting possibilities for probing dynamic processes in nanostructures in real time and space. This article gives a brief introduction into the emerging research field of ultrafast nano-optics and discusses recent progress made in it. A particular emphasis is laid on the recent experimental work performed in the authors' laboratories. We specifically discuss how ultrafast nano-optical techniques can be used to probe and manipulate coherent optical excitations in individual and dipole-coupled pairs of quantum dots, probe the dynamics of surface plasmon polariton excitations in metallic nanostructures, generate novel nanometer-sized ultrafast light and electron sources and reveal the dipole interaction between excitons and surface plasmon polaritons in hybrid metal-semiconductor nanostructures. Our results indicate that such hybrid nanostructures carry significant potential for realizing novel nano-optical devices such as ultrafast nano-optical switches as well as surface plasmon polariton amplifiers and lasers. Two-dimensional finite difference time domain (FDTD) simulation of the spatio-temporal evolution of a 10 fs light pulse at a center wavelength of 810 nm propagating through a tapered, perfectly conducting metal-coated fiber probe of 100 nm aperture diameter. The field intensity |Ex(x, y, t)| 2 is displayed on a logarithmic intensity scale at four different instants in time. After t ∼ 14 fs the pulse center reaches the aperture, generating directly below it an ultra-short near-field spot of light.

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Section: A Nanometer-sized Femtosecond Electron Source Based On Opticmentioning

confidence: 90%

Ultra‐fast nano‐optics

Vasa

Ropers

Pomraenke

et al. 2009

Laser & Photonics Reviews

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show abstract

“…They contain enough atoms that their properties can approach those of the bulk metals with a good degree of accuracy. 15,16 The linear 17 and nonlinear 18 photoelectric effects for the bulk metals will then be conceptually closest to the effect considered here of photoemission from nanoparticles.…”

Section: A General Remarksmentioning

confidence: 96%

Ionization of nanoparticles by supershort moderate-intensity laser pulses

2014

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This paper presents the results of the numerical modelling of electron emission from metallic nanoparticles under the action of femtosecond laser pulses with peak intensity from tenths of a terawatt to tens of terawatts per square centimeter. The model takes into account the effects of the excitation of the valence electrons of the nanoparticle due to multiphoton absorption, described by the Keldysh model, and the increase of the ionization potential due to the generation of positive charge in the nanoparticle during electron emission. The transition from multiphoton ionization to tunnel emission as the laser-radiation intensity increases is demonstrated, and it is shown that Fowler's model and its modification give a substantial underestimate of both the peak photoemission rate and the total emission current.

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“…According to Drude dispersion theory the dielectric permeability of photoexcited semiconductor can be determined by the plasma frequency of the electron gas (ωp), incident radiation frequency (ω) and the frequency of electron collisions ( ), according to following expressions: where n is the initial value of the semiconductor permittivity, and ΄ and ΄΄ is the real and imaginary parts of the permeability. Let us consider dynamics of the dielectric permeability in the surface layer of semiconductor taking into account the change in the plasma frequency of non-equilibrium carriers by using a mathematical model (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21). This will help us to identify the role of different emission processes in evolution of the optical properties during a femtosecond pulse.…”

Section: Effect Of Electron Emission On Changes In Optical Propertiesmentioning

confidence: 99%

“…Although the theory of multiphoton absorption is pretty well developed [17], there is a certain difficulty regarding definition of multi-photon absorption cross-sections of real media, when this theory is used for the analysis of multiphoton absorption during femtosecond laser action.…”

Section: Introductionmentioning

confidence: 99%

“…According to the estimates given above, its magnitude is about 10 -14 -10 -13 s, which is comparable with the pulse duration (tens of femtoseconds). However, further studies [16][17][18][19] have shown that the electron-electron relaxation time can be reduced up to 10 -16 s at the electron gas temperatures of ~ 100 000 K, achieved by the action of ultrashort laser pulse. In other words, two-temperature model could be applied to analyze the effects of femtosecond laser pulse.…”

Section: Introductionmentioning

confidence: 99%

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