Bow-tie nano-antenna assisted generation of extreme ultraviolet radiation

Pfullmann, Nils; Waltermann, Christian; Noack, Monika; Rausch, Stefan; Nagy, Tamás; Reinhardt, Carsten; Kovačev, Milutin; Knittel, Vanessa; Bratschitsch, Rudolf; Akemeier, Dieter; Hütten, Andreas; Leitenstorfer, Alfred; Morgner, Uwe

doi:10.1088/1367-2630/15/9/093027

Cited by 72 publications

(79 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, no signature of coherent high harmonic radiation was found, although sufficient intensities for HHG were reached in the nanostructures, and the experiments were repeated numerous times with different bow-ties and waveguides for various laser intensities, gas species, and pressures. Very recently, an independent study involving a similar implementation with bow-tie nanoantennas has resulted in the clear observation of fluorescent emission, with no conclusive evidence of high harmonic radiation [107].…”

Section: Plasmonic Enhancement Of Hhg Revisitedmentioning

confidence: 99%

Extreme-ultraviolet light generation in plasmonic nanostructures

et al. 2013

View full text Add to dashboard Cite

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

show abstract

Section: Plasmonic Enhancement Of Hhg Revisitedmentioning

confidence: 99%

Extreme-ultraviolet light generation in plasmonic nanostructures

et al. 2013

View full text Add to dashboard Cite

show abstract

“…However, despite its initial meteoric success and promises, plasmon-enhanced harmonic emission process still suffers in many aspects, such as the melting of the metallic nanostructures caused by the high build-up intensities near the metal surface. Additionally, the low conversion-efficiency due to the low target gas density contributing to the photo-emission makes challenging to increase the signal/noise ratio [15,33]. On the other hand, there are apparent discrepancies between the intensity enhancements predicted through finite-element simulations and those that are necessary for efficient HHG as estimated by the conventional threestep model [37].…”

Section: W/cmmentioning

confidence: 99%

“…We increase the principal quantum number of the initial Rydberg state n, and n-scale the relevant field parameters accordingly. In our simulations, we assume a bowtie shaped nano-antenna as our plasmonic-enhanced field source, since this particular case has been extensively investigated [11][12][13][14][15][16]. However, our simulations could be in principle extended to any nano-structure element whose spatio-temporal profile is analogous to the bow-tie nanoantennae one.…”

Section: W/cmmentioning

confidence: 99%

“…It has been shown that 100 − 1000 TW/cm 2 of peak intensities are harmful to nanostructures [12][13][14][15], therefore alternatives to diminish these values would be highly desirable. These values are also valid for our set of I and β parameters, since the intensity is enhanced up to 300 TW/cm 2 near the metal's surfaces.…”

Section: B Plasmonic-hhg With N-scaled Field Parametersmentioning

confidence: 99%

See 1 more Smart Citation

High-order-harmonic generation from Rydberg atoms driven by plasmon-enhanced laser fields

et al. 2016

View full text Add to dashboard Cite

We theoretically investigate high-order harmonic generation (HHG) in Rydberg atoms driven by spatially inhomogeneous laser fields, induced, for instance, by plasmonic enhancement. It is well known that the laser intensity should to exceed certain threshold in order to generate HHG, when noble gas atoms in their ground state are used as an active medium. One way to enhance the coherent light coming from a conventional laser oscillator is to take advantage of the amplification obtained by the so-called surface plasmon polaritons, created when a low intensity laser field is focused onto a metallic nanostructure. The main limitation of this scheme is the low damage threshold of the materials employed in the nanostructures engineering. In this work we propose to use Rydberg atoms, driven by spatially inhomogeneous, plasmonic-enhanced laser fields, for HHG. We exhaustively discuss the behaviour and efficiency of these systems in the generation of coherent harmonic emission. To this aim we numerically solve the time-dependent Schrödinger equation for an atom with an electron initially in a highly excited n-th Rydberg state, located in the vicinity of a metallic nanostructure, where the electric field changes spatially on the scales relevant for the dynamics of the laser-ionized electron. We first use a one-dimensional model to investigate the phenomena systematically. We then employ a more realistic situation, when the interaction of a plasmonic-enhanced laser field with a three-dimensional Hydrogen atom is modelled. We discuss the scaling of the relevant input parameters with the principal quantum number n of the Rydberg state in question, and demonstrate that harmonic emission could be achieved from Rydberg atoms well below the damage threshold, thus without deteriorating the geometry and properties of the metallic nanostructure.

show abstract

“…Recently, with the developments of the laser technology and the nanoscale physics, the scheme of the atto-nanophysics has received much attention in HHG. [21][22][23][24][25] In this scheme, the interaction between the laser and the atoms/molecules is under the metallic nanostructure. Thus, due to the collective oscillation of the free charges around the vicinity of the metallic nanostructure, the laser intensity can be enhanced to present the inhomogeneous¯eld in space (also called the plasmonic-enhanced inhomogeneous¯eld).…”

Section: Introductionmentioning

confidence: 99%

High-intensity attosecond pulse generation by using inhomogeneous laser field in frequency and space

Feng

Castle

et al. 2017

J. Nonlinear Optic. Phys. Mat.

View full text Add to dashboard Cite

High-order harmonic spectra and attosecond source generation from Ar atom driven by the inhomogeneous laser¯eld in frequency and space have been theoretically investigated. The results showed that (i) for the case of the frequency modulation of the laser, the harmonic cuto® can be remarkably extended with the introduction of the chirp of the laser¯eld, (ii) for the case of the space modulation of the laser, the harmonic cuto® can be further extended by using the positive spatial inhomogeneous¯eld, (iii) by properly adding a terahertz controlling¯eld, the intensity of the harmonic yield can be enhanced by 2 orders of magnitude, showing a 775 eV supercontinuum. As a result,¯ve isolated attosecond pulses (IAPs) from 60 as to 22 as can be obtained.

show abstract

Bow-tie nano-antenna assisted generation of extreme ultraviolet radiation

Cited by 72 publications

References 43 publications

Extreme-ultraviolet light generation in plasmonic nanostructures

Extreme-ultraviolet light generation in plasmonic nanostructures

High-order-harmonic generation from Rydberg atoms driven by plasmon-enhanced laser fields

High-intensity attosecond pulse generation by using inhomogeneous laser field in frequency and space

Contact Info

Product

Resources

About