Infrared electron photoemission from a gold surface

Farkas, Gy.; Tóth, Cs.; Kőházi-Kis, A.; Agostini, Pierre; Petite, G.; Martin, Ph.; Berset, J.M.; Ortéga, J.M.

doi:10.1088/0953-4075/31/10/004

Cited by 25 publications

(15 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In case of multiphoton photoelectric effect of metals, Farkas & Tóth (1990) and Farkas et al (1998) measured very high-order above-threshold electrons coming from metal targets. The theoretical interpretation of these results has been first given by the present author in and recently in Kroó et al (2007).…”

Section: Classical Description Of Basic Strong Field Phenomena Carrimentioning

confidence: 99%

“…Kylstra (2001)), and considers the inelastic electron scattering on the oscillating double-layer potential generated by the incoming laser field at the metal surface. The model has already been succesfully used to interpret the experimental results on very high order surface photoelectric effect in the near infrared (Farkas & Tóth (1990)) and in the far infrared regime (Farkas et al, 1998). In this description the basic interaction leading to very high nonlinearities is caused by the collective velocity field of the oscillating electrons near the metal surface, within a layer of thickness smaller that the penetration depth δ.…”

Section: Classical Description Of Basic Strong Field Phenomena Carrimentioning

confidence: 99%

See 1 more Smart Citation

Intensity Effects and Absolute Phase Effects in Nonlinear Laser-Matter Interactions

Varró¹

2010

Laser Pulse Phenomena and Applications

View full text Add to dashboard Cite

Section: Classical Description Of Basic Strong Field Phenomena Carrimentioning

confidence: 99%

Section: Classical Description Of Basic Strong Field Phenomena Carrimentioning

confidence: 99%

Intensity Effects and Absolute Phase Effects in Nonlinear Laser-Matter Interactions

Varró¹

2010

Laser Pulse Phenomena and Applications

View full text Add to dashboard Cite

“…In particular multiphoton induced electron emission has been observed on various metal surfaces, when irradiated at the level of only a few MW/cm 2 . This effect is very surprising since, more than 40 photons being necessary to extract the electrons, such a process should have a very low probability [40]. Experiments in medicine (photoablation) have also been recently performed [41].…”

Section: Othersmentioning

confidence: 99%

Free-electron lasers sources for scientific applications

Couprie

Ortéga

2000

Analusis

View full text Add to dashboard Cite

The free-electron laser (FEL), operated for the first time in 1978 [1] is based on the amplification of an optical wave by a high-energy electron beam. After about 20 years of research, it appears that the FEL is mature in the spectral range of UV to infrared, although intensive research is continuing in the field of short wavelength and high power [2].The gain medium of a FEL is a high-energy electron beam (several MeV or more) passing through a transverse magnetic field called "undulator". The undulator causes an electron oscillation perpendicular to its direction of propagation and, therefore, couples it with the optical field. Undulators are also commonly used on storage rings as powerful UV and X ray sources [3]. The relative degree of coherence of the light produced by these sources is due to the periodicity of the undulator providing a higher spectral brilliance than ordinary synchrotron radiation. In addition, under certain conditions, the interaction in the undulator of the emitted radiation with the electron beam leads to light amplification [2]. This effect, when operating within an optical cavity ( Fig. 1), is the principle of the Free-Electron Laser ("FEL").The laser radiation is emitted by the FEL at the "resonance wavelength" λ R :λ o is the magnetic period of the undulator (a few cm in practice); E = γmc 2 is the electron beam energy (Einstein's formula) giving numerically for the relativistic factor: γ ≅ 2.E(MeV); K = eBλ o /2πmc is the deflection parameter proportional to the magnetic field B of the undulator (K = 1 to 3 typically).Tuning of the laser wavelength is done continuously by varying either the undulator gap, which modifies the value of the K parameter, the electron energy or a combination of the two.Typical electron energies are:-5 -10 MeV to produce wavelengths in far infrared -10 -50 MeV mid-infrared -500 -1000 MeV UV -VUV -10 to 20 GeV? X raysThe length of an accelerator is about 1 m/5 MeV, except for electrostatic machines which are longer, but limited to a few MeV.Indeed, the most striking characteristic of the FEL is that the gain medium can be tuned to any wavelength. The lasing range is limited, in principle, only by the energies that can be reached by the accelerator, while attaining sufficiently good beam properties. However, at short wavelength, it is very difficult to obtain a sufficiently high optical gain.In the infrared spectral range, the combination of high achievable gains and broadband metal mirrors leads to continuously tuning FELs over a very wide spectral range (1 or 2 orders of magnitude in wavelength). In the UV & VUV, the reflectivity achievable with mirrors with today technology decrease rapidly at wavelengths shorter than about 200 nm. Therefore, the shortest lasing wavelength is presently about 200 nm [4] and nowadays 5 FELs are operating at 300 nm or below. Coherent emission in the VUV range has been obtained by harmonic generation of an external laser focused on the electron beam [5]. In the future, short wavelength harmonics of the FEL itself could con...

show abstract

“…Enhancements in photoemission quantum efficiency by more than three orders of magnitude have been observed in the presence of SPP excitation from both silver and gold films using the Kretschmann-Raether configuration [14,15] compared to non-plasmonic photoemission yields from metal surfaces [16][17][18]. The electron photoemission enhancement is attributed solely to increased energy 3.1 Introduction 41 density within the metal film due to nearly 100% SPP coupling efficiency of the incident radiation [14,15].…”

mentioning

confidence: 99%