Field localization and rescattering in tip‐enhanced photoemission

Yalunin, Sergey V.; Herink, Georg; Solli, Daniel R.; Krüger, Michael; Hommelhoff, Peter; Diehn, Manuel; Munk, Axel; Ropers, Claus

doi:10.1002/andp.201200224

Cited by 43 publications

(40 citation statements)

References 37 publications

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“…Applications are diverse and include surface enhanced Raman scattering [1,2], second [3,4] and third [5,6] harmonic generation, two-photon photoluminescence [59,60], continuum generation [61] or localized multiphoton photoemission [7,8]. Recently, even higher nonlinear effects such as above-threshold and strong-field photoemission and acceleration were observed in plasmonic and other nanostructures [12,62,63,17,15,64], closing the gap to strong-field and attosecond physics. [13,14] Another key example of this development was the report of high-harmonic generation (HHG) in plasmonic bow-tie antennas [24], that is, the integration of the most prominent strong-field effect of gaseous media [20,33] into a nanostructure.…”

Section: Methodsmentioning

confidence: 99%

“…Numerous characteristic nonlinear optical phenomena, such as above-threshold and strongfield photoemission, have become accessible using local field enhancements in metal nano-tips [12,62,13,14,15], resonant optical antennas [24,28,16,81], nanoparticles [17], rough surfaces [63], and plasmonic waveguides [26,15]. These experimental studies are paralleled by increasing theoretical efforts of describing strong-field effects at surfaces and in optical near fields [82,83,64], with a particular emphasis on nanostructure-enhanced high-order harmonic generation (HHG) [46,65,66,84,67,85,86,87,88,89,90]. Currently, some debate exists about experimental reports of nanostructure-enhanced HHG [24,26,15], following the demonstration of the predominance of incoherent extreme-ultraviolet (EUV) fluorescence caused by multiphoton and strong-field atomic excitation and ionization [28,81].…”

Section: Chapter 4 Generation and Bistability Of A Waveguide Nanoplasmamentioning

confidence: 99%

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Extreme-ultraviolet light generation in plasmonic nanostructures

et al. 2013

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The present (cumulative) thesis examines fundamentals of nanostructure-enhanced extreme-ultraviolet light generation in noble gases using two different nanostructure geometries for local field-enhancement. Specifically, resonant antennas and tapered hollow waveguide nanostructures are utilized to enhance low-energy femtosecond laser pulses, which in turn induce light emission from excited xenon, argon and neon atoms and ions. Spectral analysis of this radiation reveals that coherent high-order harmonic generation is not feasible under the examined conditions, contrary to former expectations and reports. Instead, the spectral characteristics unequivocally identify that incoherent fluorescence from multiphoton excited and strong-field ionized gas atoms is the predominant process in such schemes. Furthermore, novel nanostructure-enhanced effects are reported such as surface-enhanced fifth-order harmonic generation (from bow-tie nanoantennas) and the formation of a bistable nanoplasma (in a hollow waveguide). These effects offer intriguing links between nonlinear nano-optics, plasma dynamics and extreme-ultraviolet radiation.v vi

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Section: Methodsmentioning

confidence: 99%

Section: Chapter 4 Generation and Bistability Of A Waveguide Nanoplasmamentioning

confidence: 99%

Extreme-ultraviolet light generation in plasmonic nanostructures

et al. 2013

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“…The excitation wavelengths in our experiments span from near-infrared (NIR) to terahertz (THz) frequencies. As demonstrated in the following, strong-field excitation at long wavelengths facilitates access to sub-cycle electron dynamics in spatially confined electric fields [11,20].…”

Section: Photoelectron Dynamics At Sharp Metal Nanotipsmentioning

confidence: 98%

Highly Nonlinear and Ultrafast Optical Phenomena in Metallic Nanostructures

Wimmer

Sivis

Herink

et al. 2015

Ultrafast Dynamics Driven by Intense Light Pulses

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This Chapter presents recent findings on nonlinear ionization and photoemission processes at metallic nanostructures. A particular emphasis is placed on processes which-due to the localized excitation in optical near-fields-exhibit different properties and scalings from their counterparts in the gas phase or at planar surfaces. The Chapter is structured in two parts. The first part discusses various regimes in highly nonlinear photoelectron emission from metallic nanotips, including field-driven photoemission at near-and mid-infrared frequencies, and the control of localized photoemission using intense terahertz transients. In the second part, multiphoton and strong-field ionization of atomic gases in plasmonic antennas and waveguides is presented. It is demonstrated that local ionization is enabled by optical field enhancements in various types of structures. At the same time, fundamental physical limitations preventing efficient high-harmonic generation in nanostructures are discussed.

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“…A more detailed treatment of electron emission within the strong-field regime can be found in Refs. [174,175] and references therein. The potential operation of an electron gun in the optical-field emission regime is briefly discussed at the end of Chap.…”

Section: Pulsed Electron Sourcesmentioning

confidence: 99%

“…For a more detailed account on the r-dependence of the potential of a nanometric tip, see Ref. [174].…”

Section: A1 Analytical Model For Pulse Durationsmentioning

confidence: 99%