Generation of soft x-ray and water window harmonics using a few-cycle, phase-locked, optical parametric chirped-pulse amplifier

Ishii, Nobuhisa; Adachi, Shunsuke; Nomura, Yutaka; Kosuge, Atsutake; Kobayashi, Yohei; Kanai, Teruto; Itatani, Jiro; Watanabe, S.

doi:10.1364/ol.37.000097

Cited by 15 publications

(12 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This behaviour is most probably due to heavy ionization and associated plasma effects, which degrade the phase coherence of generated HHs. Such observation for HH spectra around 180 eV has been demonstrated using near-infrared drive pulses at 800 nm (Ishii et al 24). …”

Section: Resultsmentioning

confidence: 77%

Carrier-envelope phase-dependent high harmonic generation in the water window using few-cycle infrared pulses

et al. 2014

Self Cite

View full text Add to dashboard Cite

High harmonic generation (HHG) using waveform-controlled, few-cycle pulses from Ti:sapphire lasers has opened emerging researches in strong-field and attosecond physics. However, the maximum photon energy of attosecond pulses via HHG remains limited to the extreme ultraviolet region. Long-wavelength light sources with carrier-envelope phase stabilization are promising to extend the photon energy of attosecond pulses into the soft X-ray region. Here we demonstrate carrier-envelope phase-dependent HHG in the water window using sub-two-cycle optical pulses at 1,600 nm. Experimental and simulated results indicate the confinement of soft X-ray emission in a single recombination event with a bandwidth of 75 eV around the carbon K edge. Control of high harmonics by the waveform of few-cycle infrared pulses is a key milestone to generate soft X-ray attosecond pulses. We measure a dependence of half-cycle bursts on the gas pressure, which indicates subcycle deformation of the waveform of the infrared drive pulses in the HHG process.

show abstract

Section: Resultsmentioning

confidence: 77%

Carrier-envelope phase-dependent high harmonic generation in the water window using few-cycle infrared pulses

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Generated high harmonics were spectrally dispersed by a soft-X-ray spectrometer (SXR-II-1, Hettrick Scientific) and detected by a microchannel plate. The details of high harmonic generation and detection are described elsewhere [14]. Figure 4(c) shows harmonic spectra measured with an acquisition time of 10 s. The red line in Fig.…”

mentioning

confidence: 99%

Sub-two-cycle, carrier-envelope phase-stable, intense optical pulses at 16 μm from a BiB_3O_6optical parametric chirped-pulse amplifier

et al. 2012

View full text Add to dashboard Cite

We report on the generation of 9.0 fs, 550 μJ, carrier-envelope phase (CEP)-stabilized optical pulses around 1.6 μm at 1 kHz. Few-cycle IR pulses are obtained from a BiB(3)O(6) optical parametric chirped-pulse amplifier. The amplification of nearly octave-spanning ultrabroad pulses without spectral broadening results in good stability in output energy (0.85% rms) and CEP (160 mrad rms). We observed high harmonics in the water window from a neon cell that corresponds to a laser intensity of 4.1×10(14) W/cm(2).

show abstract

“…These CEPdependent structures can be explained as the sum of individual half-cycle bursts and have been observed experimentally [44][45][46]. Here, we consider the HHG spectra with a four-cycle pulse in addition to a single resonant XUV pulse as shown in Fig.…”

Section: A Single Xuv Pulse + Few-cycle Ir Fieldmentioning

confidence: 77%

Attosecond dynamics of light-induced resonant hole transfer in high-order-harmonic generation

2017

View full text Add to dashboard Cite

We present a study of high-order-harmonic generation (HHG) assisted by extreme ultraviolet (XUV) attosecond pulses, which can lead to the excitation of inner-shell electrons and the generation of a second HHG plateau. With the treatment of a one-dimensional model of krypton, based on time-dependent configuration interaction singles (TDCIS) of an effective two-electron system, we show that the XUV-assisted HHG spectrum reveals the duration of the semiclassical electron trajectories. The results are interpreted by the strong-field approximation (SFA) and the importance of the hole transfer during the tunneling process is emphasized. Finally, coherent population transfer between the inner and outer holes with attosecond pulse trains is discussed.

show abstract

Generation of soft x-ray and water window harmonics using a few-cycle, phase-locked, optical parametric chirped-pulse amplifier

Cited by 15 publications

References 16 publications

Carrier-envelope phase-dependent high harmonic generation in the water window using few-cycle infrared pulses

Carrier-envelope phase-dependent high harmonic generation in the water window using few-cycle infrared pulses

Sub-two-cycle, carrier-envelope phase-stable, intense optical pulses at 16 μm from a BiB_3O_6optical parametric chirped-pulse amplifier

Attosecond dynamics of light-induced resonant hole transfer in high-order-harmonic generation

Contact Info

Product

Resources

About