High-energy half-cycle cutoffs in high harmonic and rescattered electron spectra using waveform-controlled few-cycle infrared pulses

Geiseler, Henning; Ishii, Nobuhisa; Kaneshima, Keisuke; Kitano, Koji; Kanai, Teruto; Itatani, Jiro

doi:10.1088/0953-4075/47/20/204011

Cited by 7 publications

(5 citation statements)

References 55 publications

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“…The studies on the CEP effects in HHG have mainly focused on the high-energy regime, where high energy half-cycle cutoffs were observed [10,11]. The CEP effects are related to the electron dynamics happening within a single laser cycle [12] and can be applied to detect the ultrafast electron dynamics or select a single attosecond pulse [13,14].…”

Section: Introductionmentioning

confidence: 99%

Half-cycle cutoff in near-threshold harmonic generation

et al. 2015

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A half-cycle cutoff is identified in the harmonic generation spectra near the ionization potential for short driving laser pulses. Unlike the half-cycle cutoff in the high-energy region, the newly found lowenergy cutoff is strongly affected by the ionic potential and multiple return trajectories. We show their contribution clearly in the observable harmonic spectrum based on the reference of this cutoff structure. Our results are calculated from a numerical solution to the 3D time-dependent Schrödinger equation and a classical trajectory Monte Carlo method. By comparing the results from both methods, we analyze the time-dependent sub-cycle electron dynamics and provide a transparent explanation to this half-cycle cutoff. We further investigate the low-energy harmonic yield as a function of CEP for different pulse durations. The modulation depth of this yield drops rapidly when the pulse duration is increased, which can explain the CEP-dependence recently observed in the experiment.

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Section: Introductionmentioning

confidence: 99%

Half-cycle cutoff in near-threshold harmonic generation

et al. 2015

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“…(1600 nm) are the frequencies, ϕ 1 and ϕ 2 are the carrier-envelope phases (CEP), which are set zero. These two kinds of laser field can be achieved nowadays with the optical parametric chirped pulse amplification (OPCPA) laser systems [38][39][40]. In this calculation, the total time duration is…”

Section: Resultsmentioning

confidence: 99%

Comparison of high harmonic generation and attosecond pulse from 3D hydrogen atom in three kinds of inhomogeneous fields

et al. 2016

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“…In addition, using the MIR fields whose polarization is parallel or perpendicular to the grating grooves, the photoelectron spectrum is measured under the PSP resonance condition using a time-of-flight photoelectron spectrometer with a 48 cm-long field-free flight tube under the on- and off-resonant conditions. The photoelectron spectrometer is described in ref . It should be noted that no photoemission takes place with our detection limit when an Al-coated flat substrate is used as a reference.…”

Section: Methodsmentioning

confidence: 99%

Resonant-Like Field Enhancement by Nanoscale Grating-Coupled Propagating Surface Plasmons and Localized Surface Plasmons in the Mid-Infrared Range: Implications for Ultrafast Plasmonic Electron Sources

Mizuno

Takeuchi

Kaneshima

et al. 2019

ACS Appl. Nano Mater.

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We investigated electron emission induced by an intense mid-infrared (MIR) field from a nanoscale aluminum-coated grating. The total photoelectron yields clearly show a resonant-like behavior when frustrated diffraction occurs near the Wood anomaly. This result indicates that a strong near field, which is formed by the localized surface plasmons (LSPs) at the ridge of the grating, can be enhanced by resonantly produced propagating surface plasmons (PSPs) owing to the phase matching between the diffracted light and PSPs. The observed photoelectron spectra can be reproduced well by a simple one-dimensional (1D) model of a near field that contains two parameters: the field enhancement factor, α, and the ridge radius, r 0. In addition, we show that the resonant-like photoemission was attributed to the interference of the near fields produced by the LSPs and PSPs in the nanoscale grating structure. These results demonstrate that the nanoscale structure is useful for ultrafast plasmonic electron sources.

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High-energy half-cycle cutoffs in high harmonic and rescattered electron spectra using waveform-controlled few-cycle infrared pulses

Cited by 7 publications

References 55 publications

Half-cycle cutoff in near-threshold harmonic generation

Half-cycle cutoff in near-threshold harmonic generation

Comparison of high harmonic generation and attosecond pulse from 3D hydrogen atom in three kinds of inhomogeneous fields

Resonant-Like Field Enhancement by Nanoscale Grating-Coupled Propagating Surface Plasmons and Localized Surface Plasmons in the Mid-Infrared Range: Implications for Ultrafast Plasmonic Electron Sources

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