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

Feng, Liqiang; Li, Wenliang; Castle, R. S.; Li, Yang

doi:10.1142/s0218863517500345

Cited by 5 publications

(2 citation statements)

References 42 publications

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“…Moreover, the high-intensity harmonic yield is favorable for the enhancement of the signal intensity of the SAPs. Generally, the harmonic yield can be enhanced with the assistance of the UV pulse [44,45], noise field [46] and THz field [47,48], etc. Recently, the investigations of the HHG from H + 2 or H 2 have shown that the harmonic yield is relevant to the nuclear correlation function [49] and can be enhanced as the initial vibrational state increases [50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Nano-plasmonic-pump-probe effect on the intensity enhancement of attosecond pulse from hydrogen molecular ion

Feng

2018

Laser Phys. Lett.

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An effective scheme to extend the harmonic cutoff and enhance the harmonic yield from ion by using nano-plasmonic-pump-probe technology has been proposed. The essence of the present scheme is to use the pump pulse to steer to the multi-photon-resonance-ionization region, where the ionization probability can be remarkably enhanced. Then, a sequential probe pulse with a proper delay time can enhance the harmonic yield. Furthermore, by properly choosing the injected position of and by properly adding a controlling pulse, a single harmonic emission event with a broader harmonic plateau can be obtained. Finally, by the Fourier transformation of the selected harmonics on the harmonic plateau, a single 38 as pulse with intensity enhancement of 400 times can be obtained.

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Section: Introductionmentioning

confidence: 99%

Nano-plasmonic-pump-probe effect on the intensity enhancement of attosecond pulse from hydrogen molecular ion

Feng

2018

Laser Phys. Lett.

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“…5 Terahertz waves was also proposed for enhancement of harmonic yield of high harmonic generator for producing attosecond XUV and X-ray pulse. 6 For developing terahertz system, sources and detectors are not the only components. Terahertz absorbers, 7 modulators, 8 splitters, 8 waveguides, 5,9 planar circuits, 8 etc.…”

Section: Introductionmentioning

confidence: 99%

Low-loss ARROW waveguide with rectangular hollow core and rectangular low-density polyethylene/air reflectors for terahertz waves

Uranus

Rahman

2018

J. Nonlinear Optic. Phys. Mat.

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Designing low-loss waveguides for terahertz waves is challenging as most materials are very lossy in this frequency band. Most scientists simply consider transmitting the waves through low-loss air, which however also has its own difficulties as index-guiding is not possible. In this paper, we report on the design of low-loss waveguides for terahertz waves and associated results by using a finite element leaky mode solver. These results show that waveguides designed using ARROW (anti-resonant reflecting optical waveguide) approach yield a low combined absorption and leakage loss down to only 0.05[Formula: see text]dB/cm for the q-TE[Formula: see text] fundamental mode using realistic values of refractive index at 1 THz operating frequency. The structure employs rectangular hollow-core and low-density polyethylene/air anti-resonant reflecting bilayers, which can be easily fabricated. These results are compared with those of other structures, i.e., a photonic crystal fiber-like structures using the same materials with rectangular holes, which is shown to give a higher loss of 3[Formula: see text]dB/cm and a suspended air-core waveguide with TOPAS vein offering a loss of 1[Formula: see text]dB/cm.

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Single attosecond pulse generation by using plasmon-driven double optical gating technology in crossed metal nanostructures

Feng

Liu

2018

Int. J. Mod. Phys. B

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An effective method to obtain the single attosecond pulses (SAPs) by using the multi-cycle plasmon-driven double optical gating (DOG) technology in the specifically designed metal nanostructures has been proposed and investigated. It is found that with the introduction of the crossed metal nanostructures along the driven and the gating polarization directions, not only the harmonic cutoff can be extended, but also the efficient high-order harmonic generation (HHG) at the very highest orders occurs only at one side of the region inside the nanostructure. As a result, a 93 eV supercontinuum with the near stable phase can be found. Further, by properly introducing an ultraviolet (UV) pulse into the driven laser polarization direction (which is defined as the DOG), the harmonic yield can be enhanced by two orders of magnitude in comparison with the singe polarization gating (PG) technology. However, as the polarized angle or the ellipticity of the UV pulse increase, the enhancement of the harmonic yield is slightly reduced. Finally, by superposing the selected harmonics from the DOG scheme, a 30 as SAP with intensity enhancement of two orders of magnitude can be obtained.

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

Cited by 5 publications

References 42 publications

Nano-plasmonic-pump-probe effect on the intensity enhancement of attosecond pulse from hydrogen molecular ion

Nano-plasmonic-pump-probe effect on the intensity enhancement of attosecond pulse from hydrogen molecular ion

Low-loss ARROW waveguide with rectangular hollow core and rectangular low-density polyethylene/air reflectors for terahertz waves

Single attosecond pulse generation by using plasmon-driven double optical gating technology in crossed metal nanostructures

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