Studies of multiphoton production of vacuum-ultraviolet radiation in the rare gases

McPherson, A.; Gibson, George N.; Jara, Hernán; Johann, Ulrich; Luk, T. S.; McIntyre, I. A.; Boyer, K.; Rhodes, C. K.

doi:10.1364/josab.4.000595

Cited by 1,606 publications

(919 citation statements)

References 51 publications

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“…High-order harmonic up-conversion of intense laser radiation in gaseous media was first discovered in the late 1980s [18,19,20] and allows for new experimental strategies in nanoscale photonic-imaging [21] or ultrafast spectroscopy [22,23] by providing fully coherent attosecond light pulses at extreme-ultraviolet (EUV) wavelengths. State-of-the-art HHG concepts typically utilize moderately focused, ultrashort laser pulses from kHz amplifier systems to reach intensities in excess of 10 13 W/cm 2 (for infrared light frequencies), which are necessary to drive the HHG process in an atomic gas.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

Extreme-ultraviolet light generation in plasmonic nanostructures

et al. 2013

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“…HHG as the only method to generate the isolated attosecond pulse has been widely investigated [4][5][6][7][8][9][10][11][12][13] since its discovery in the late 1980s [14][15][16]. So far, the HHG process can be well understood by means of the well-known semiclassical three-step model [17,18] or by the quantum theory [19].…”

Section: Introductionmentioning

confidence: 99%

High-order harmonic generation spectra and isolated attosecond pulse generation with a two-color time delayed pulse

Feng

Chu

2012

Journal of Electron Spectroscopy and Related Phenomena

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“…atoms or molecules, is exposed to short and intense laser radiation, non-linear phenomena are triggered as a consequence of this interaction. Amongst these phenomena, high-order harmonics generation (HHG) process [1,2] has attracted considerable interests, since it is one of the most reliable pathways to generate coherent light from the ultraviolet (UV) to extreme ultraviolet (XUV) spectral range. As a result, HHG has proven to be a robust source for the generation of a PHz attosecond pulses train [3], that can be temporally confined to a single XUV attosecond pulse, now with kHz repetition rates [4].…”

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confidence: 99%

High-order-harmonic generation by enhanced plasmonic near-fields in metal nanoparticles

et al. 2013

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We present theoretical investigations of high-order harmonic generation (HHG) resulting from the interaction of noble gases with localized surface plasmons. These plasmonic fields are produced when a metal nanoparticle is subject to a few-cycle laser pulse. The enhanced field, which largely depends on the geometrical shape of the metallic structure, has a strong spatial dependency. We demonstrate that the strong non-homogeneity of this laser field plays an important role in the HHG process and leads to a significant increase of the harmonic cut-off energy. In order to understand and characterize this new feature, we include the functional form of the laser electric field obtained from recent attosecond streaking experiments [F. Süßmann and M. F. Kling, Proc. of SPIE, Vol. 8096, 80961C (2011)] in the time dependent Schrödinger equation (TDSE). By performing classical simulations of the HHG process we show consistency between them and the quantum mechanical predictions. These allow us to understand the origin of the extended harmonic spectra as a selection of particular trajectory sets. The use of metal nanoparticles shall pave a completely new way of generating coherent XUV light with a laser field which characteristics can be synthesized locally. When matter, i.e. atoms or molecules, is exposed to short and intense laser radiation, non-linear phenomena are triggered as a consequence of this interaction. Amongst these phenomena, high-order harmonics generation (HHG) process [1, 2] has attracted considerable interests, since it is one of the most reliable pathways to generate coherent light from the ultraviolet (UV) to extreme ultraviolet (XUV) spectral range. As a result, HHG has proven to be a robust source for the generation of a PHz attosecond pulses train [3], that can be temporally confined to a single XUV attosecond pulse, now with kHz repetition rates [4]. Thanks to its remarkable properties, HHG can be used as well to extract temporal and spatial information with both attosecond and subAngström resolution on the generating system [5]. Hence, HHG represents a considerable tool to enable scrutinizing the atomic world with its natural temporal and spatial scales [6][7][8][9][10][11].The intuitive physical mechanism behind HHG, for a single atom or molecule (referred to as 'single emitter'), has been well established in the so-called three steps or simple man's model [12][13][14]: in the first step, an electronic wave packet is released the continuum by tunnel ionization through the potential barrier as a consequence of the non-perturbative interaction of the single emitter with the laser field. In the second step, the emitted electronic wave packet propagates away from its ionic core in the continuum to be finally driven back when the laser electric field changes its sign. In the final step, upon its return, the electronic wave packet may recombine with the core and the system relaxes the excess kinetic energy acquired by radiating a high-harmonic photon.In order to experimentally control the high harmonic ...

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Studies of multiphoton production of vacuum-ultraviolet radiation in the rare gases

Cited by 1,606 publications

References 51 publications

Extreme-ultraviolet light generation in plasmonic nanostructures

Extreme-ultraviolet light generation in plasmonic nanostructures

High-order harmonic generation spectra and isolated attosecond pulse generation with a two-color time delayed pulse

High-order-harmonic generation by enhanced plasmonic near-fields in metal nanoparticles

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