Nano‐Antennae Assisted Emission of Extreme Ultraviolet Radiation

Pfullmann, Nils; Noack, Monika; Reinhardt, Carsten; Kovačev, Milutin; Morgner, Uwe

doi:10.1002/9783527665624.ch2

Cited by 4 publications

(5 citation statements)

References 68 publications

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“…This infers that the funnelwaveguide is capable of producing intensities of stronger than 80 TW/cm 2 in consideration of the intensity enhancement factor obtained from the TPL experiment ( × 165). This experimental observation concludes that the funnel-waveguide offers strong thermal immunity in comparison to the nanostructures fabricated on thin metal layers [12,14,23]. x-pol.…”

Section: (D))supporting

confidence: 52%

“…Local field enhancement occurring in nanometer-scale structures [1] has widely been investigated for diverse applications such as surface-enhanced Raman scattering [2], multiphoton interaction for harmonic generation [3,4] and photoemission or photoluminescence [5][6][7][8][9]. Recently attention is being paid to strong field enhancement of ultrashort light pulses for generation of extreme ultraviolet light in interaction with noble gases [10][11][12][13][14][15][16]. This highly nonlinear optical frequency upconversion requires achieving high peak pulse intensities of stronger than 10 TWcm −2 from moderate pulses of ~0.1 TWcm −2 intensity.…”

Section: Introductionmentioning

confidence: 99%

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Observation of strongly enhanced ultrashort pulses in 3-D metallic funnel-waveguide

Lee¹,

Choi²,

Kim³

et al. 2014

Opt. Express

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For strong field enhancement of ultrashort light pulses, a 3-D metallic funnel-waveguide is analyzed using the finite-difference time-domain (FDTD) method. Then the maximum intensity enhancement actually developed by the funnel-waveguide upon the injection of femtosecond laser pulses is observed using two-photon luminescence (TPL) microscopy. In addition, the ultrafast dephasing profile of the localized field at the hot spot of the funnel-waveguide is verified through the interferometric autocorrelation of the TPL signal. Finally it is concluded the funnel-waveguide is an effective 3-D nanostructure that is capable of boosting the peak pulse intensity of stronger than 80 TWcm(-2) by an enhancement factor of 20 dB without significant degradation of the ultrafast spatiotemporal characteristics of the original pulses.

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Section: (D))supporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Observation of strongly enhanced ultrashort pulses in 3-D metallic funnel-waveguide

Lee¹,

Choi²,

Kim³

et al. 2014

Opt. Express

View full text Add to dashboard Cite

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“…Theoretical studies have suggested that strong field enhancement for HHG may be achievable with various nanostructure designs such as nano-antennas 14 15 16 and tapered waveguides 17 . Experimental investigations of plasmonic HHG have been carried out by devising bow-tie and funnel-waveguide nanostructures 18 19 20 21 22 23 . The nanostructures adopted thus far have suffered from two major shortcomings.…”

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confidence: 99%

High-harmonic generation by field enhanced femtosecond pulses in metal-sapphire nanostructure

et al. 2016

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Plasmonic high-harmonic generation (HHG) drew attention as a means of producing coherent extreme ultraviolet (EUV) radiation by taking advantage of field enhancement occurring in metallic nanostructures. Here a metal-sapphire nanostructure is devised to provide a solid tip as the HHG emitter, replacing commonly used gaseous atoms. The fabricated solid tip is made of monocrystalline sapphire surrounded by a gold thin-film layer, and intended to produce EUV harmonics by the inter- and intra-band oscillations of electrons driven by the incident laser. The metal-sapphire nanostructure enhances the incident laser field by means of surface plasmon polaritons, triggering HHG directly from moderate femtosecond pulses of ∼0.1 TW cm−2 intensities. The measured EUV spectra exhibit odd-order harmonics up to ∼60 nm wavelengths without the plasma atomic lines typically seen when using gaseous atoms as the HHG emitter. This experimental outcome confirms that the plasmonic HHG approach is a promising way to realize coherent EUV sources for nano-scale near-field applications in spectroscopy, microscopy, lithography and atto-second physics.

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“…While initially interpreted as high harmonic radiation [108,109], subsequent work identified EUV fluorescence following multiphoton excitation and strong-field ionization as the main cause of this emission [110][111][112]. Chapter 2 presents recent results on this topic by one of the groups working in this field [113,114]. In atomic and molecular systems, such strong-field interactions are well investigated.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Nano‐Focusing for Imaging and Spectroscopy with Electrons and Light

Lienau

Raschke

Ropers

2014

Attosecond Nanophysics

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There is an urgent need for improved or conceptually new, ultrafast microscopy techniques which combine the best spatial and temporal resolutions possible. Techniques need to be developed which fuse nanometer-or atomic-scale imaging, such as scanning probe microscopy with ultrafast, femto-or attosecond time resolution, which is now commonplace in ultrafast science. A multitude of highly relevant, technological processes, such as the conversion of sunlight into electrical [1-3] or chemical energy [4-6], involves, on a microscopic level, the concerted motion of electrons and atomic nuclei. These processes are therefore governed by microscopic dynamics taking place on ultrashort and ultrasmall scales. Our ability to design and optimize such devices thus crucially depend on a detailed analysis and understanding of the spatio-temporal dynamics of charge, spin and atomic lattice excitations.A broad range of time-resolved microscopy techniques are currently under development or already in use. These techniques include X-ray diffraction/microscopy with large-scale free-electron lasers [7][8][9] or tabletop sources [10,11], ultrafast electron diffraction [12][13][14][15] or microscopy [16,17], time-resolved photoelectron emission microscopy [18-20] (Chapter 10), ultrafast, aperture-based [21][22][23][24][25] or aperture-less near-field scanning optical microscopy [26][27][28], and femtosecond scanning tunneling microscopy [29][30][31][32].So far, most of the techniques mentioned earlier provide either a limited temporal or spatial resolution, and the implementation of microscopy techniques with true nanometer and (sub-)femtosecond resolution [33] remains a formidable challenge. A fundamental problem in many of these approaches is the generation of sufficiently bright and temporally short light or electron pulses which are both coherent and energetically tunable [34].

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Nano‐Antennae Assisted Emission of Extreme Ultraviolet Radiation

Cited by 4 publications

References 68 publications

Observation of strongly enhanced ultrashort pulses in 3-D metallic funnel-waveguide

Observation of strongly enhanced ultrashort pulses in 3-D metallic funnel-waveguide

High-harmonic generation by field enhanced femtosecond pulses in metal-sapphire nanostructure

Ultrafast Nano‐Focusing for Imaging and Spectroscopy with Electrons and Light

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