Towards GW-Scale Isolated Attosecond Pulse Far beyond Carbon K-Edge Driven by Mid-Infrared Waveform Synthesizer

Fu, Yuxi; Yuan, Hua; Midorikawa, Katsumi; Lan, Pengfei; Takahashi, Eiji J.

doi:10.3390/app8122451

Cited by 10 publications

(3 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrogen is preferred because of its low absorption in the SXR region compared with other materials. Uranium foil also exhibits negative GDD beyond 300 eV 53 , but its absorption is much higher than H 2 , as shown in Fig. 1.…”

Section: Isolated Water Window X-ray Attosecond Pulsesmentioning

confidence: 83%

“…Atto-chirp can also be reduced in the HHG process by reshaping the driving field waveform using a multicolor synthesizer with controlled CEP and delay. Simulation has shown that nearly 60 pulses can be achieved in the 300-500 eV energy range without atto-chirp compensation 53 . This technique is also promising for atto-chirp suppression in keV range.…”

Section: Isolated Water Window X-ray Attosecond Pulsesmentioning

confidence: 99%

See 1 more Smart Citation

Attosecond science based on high harmonic generation from gases and solids

Li¹,

Lu²,

Chew³

et al. 2020

Nat Commun

220

126

View full text Add to dashboard Cite

Recent progress in high power ultrafast shortwave and mid-wave infrared lasers has enabled gas-phase high harmonic generation (HHG) in the water window and beyond, as well as the demonstration of HHG in condensed matter. In this Perspective, we discuss the recent advancements and future trends in generating and characterizing soft X-ray pulses from gasphase HHG and extreme ultraviolet (XUV) pulses from solid-state HHG. Then, we discuss their current and potential usage in time-resolved study of electron and nuclear dynamics in atomic, molecular and condensed matters. T abletop attosecond light sources in the soft X-ray (SXR) spectral region based on highharmonic generation are highly desirable in chemical and material sciences since they can spectroscopically identify specific elements, as well as the oxidation states, charge states and even the spin states of those elements 1. One of the important spectral regions is the "water window" (282-533 eV), which covers the atomic K-shell excitation of carbon and oxygen. Although high harmonics in the water window were first generated with Ti:Sapphire lasers centered at 800 nm more than 20 years ago 2,3 , the X-ray photon flux was too low for timeresolved applications. The mechanism of HHG in gases can be explained by the semiclassical three-step model 4-6. When driving laser-field strength reaches~10 8 V m −1 , the bound electron in the atomic gas can tunnel through the Coulomb potential barrier and become a free electron. In the oscillating laser field, the free-electron wave packet may return to its parent ion with the right time of birth. At recombination, the interference between the wave packets of the returning and bound electrons produces an oscillating dipole that emits attosecond radiation. Returning electrons with various kinetic energy will recombine at different times giving rise to the chirp in the attosecond radiation 7. This process repeats twice for every optical cycle. The temporal beating of attosecond pulses results in the high-harmonic combs in the spectral domain. Empowered by the advances in driving lasers with center wavelengths around 1.8 μm, soft X-ray high harmonics can be generated with a moderate intensity of 10 14 W cm −2 (see Box 1 for details). Significant progress has recently been made in developing attosecond light within the water window 8. By spectrally broadening pulses from an Optical Parametric Amplifier (OPA) using a gas-filled hollow-core fiber 9 or by broadband phase matching in an Optical Parametric Chirped Pulse Amplifier (OPCPA) 10 , two-cycle, mJ-level pulses centered with 1 kHz repetition

show abstract

Section: Isolated Water Window X-ray Attosecond Pulsesmentioning

confidence: 83%

Section: Isolated Water Window X-ray Attosecond Pulsesmentioning

confidence: 99%

Attosecond science based on high harmonic generation from gases and solids

Li¹,

Lu²,

Chew³

et al. 2020

Nat Commun

220

126

View full text Add to dashboard Cite

show abstract

“…Both neutral hydrogen gas and plasma could be used at lower photon energy, such as in the water window, since the required pressure-length product is much smaller. They may be combined with other schemes to reduce atto-chirp when attosecond X-ray pulses are generated with either longer wavelength driving lasers or waveform synthesizers [16,17].…”

Section: Discussionmentioning

confidence: 99%

Compensating chirp of attosecond X-ray pulses by a neutral hydrogen gas

Chang

2019

OSA Continuum

View full text Add to dashboard Cite

It is demonstrated by numerical simulations that the attosecond chirp of high order harmonic pulses in the 530 to 1000 eV range can be partially compensated by the negative group delay dispersion of unionized molecular hydrogen gas. The transmission of X-rays through gas with the required pressure-length product for optimum chirp compensation is higher than 10% in the photon energy range that covers the K-edge of oxygen and Ledges of iron, cobalt, and nickel.

show abstract

High-accuracy relative arrival time measurement for coherent beam combination based on double-humped interferometry

Liu

Wang

et al. 2023

Optics Communications

View full text Add to dashboard Cite

Towards GW-Scale Isolated Attosecond Pulse Far beyond Carbon K-Edge Driven by Mid-Infrared Waveform Synthesizer

Cited by 10 publications

References 65 publications

Attosecond science based on high harmonic generation from gases and solids

Attosecond science based on high harmonic generation from gases and solids

Compensating chirp of attosecond X-ray pulses by a neutral hydrogen gas

High-accuracy relative arrival time measurement for coherent beam combination based on double-humped interferometry

Contact Info

Product

Resources

About