Gas density measurement of pulsed gas jets using XeF four-photon fluorescence induced by a KrF laser

Adachi, Takashi; Kondo, Kiminori; Watanabe, S.

doi:10.1007/bf00333074

Cited by 15 publications

(3 citation statements)

References 9 publications

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“…In our case the phase mismatch per atom for sum frequency generation is on the order of k/n ≈ 10 −16 cm 2 [1] with the total phase mismatch k and the gas density n. We assume a homogenous gas density distribution along the propagation axis of the laser pulses. For our interaction geometry we get a gas density of n ≈ 5 × 10 16 cm −3 [10]. From these values we calculate the coherence length for our conversion process L C = 2π/ k ≈ 1 cm.…”

Section: Resultsmentioning

confidence: 99%

Coherent control of frequency conversion toward short (picosecond) vacuum-ultraviolet radiation pulses

2010

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We present experimental data on the coherent control of frequency conversion toward the vacuum-ultraviolet regime in xenon atoms, applying intense ultrashort picoseconds (ps) radiation pulses. We report on quantum interference between two resonantly enhanced frequency conversion processes (i.e., fifth harmonic generation and four-wave mixing). The conversion processes are driven by a fundamental (ps) laser pulse at 530 nm and the phase-locked second harmonic at 265 nm. Both fifth harmonic generation and four-wave mixing yield vacuum-ultraviolet radiation at 106 nm. The two frequency conversion pathways interfere with each other-either constructively or destructively, depending on the relative phase of the driving laser pulses. Thus, by variation of the relative phase, we substantially enhance or reduce the conversion efficiency (i.e., the yield of generated vacuum-ultraviolet radiation).

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Section: Resultsmentioning

confidence: 99%

Coherent control of frequency conversion toward short (picosecond) vacuum-ultraviolet radiation pulses

2010

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“…proportional to the density of limonene, Δn in the gas phase was estimated considering the vapor pressure [30]; at 358 K, the vapor pressure was 4.92 kPa. If the total gas pressure just below the capillary tube was 2700 Pa [31], the pressure of limonene would be estimated as 82 Pa. When the temperature was cooled to 100 K by supersonic expansion, the gas density of limonene was 1.4×10 -5 g/cm 3 .…”

Section: !"mentioning

confidence: 99%

Circular dichroism in high-order harmonic generation from chiral molecules

et al. 2018

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In this study, circularly polarized high harmonic generation (CP-HHG) from a chiral molecule, limonene, by a CP counter-rotating two-color laser field was found to possess circular dichroism. A high harmonic spectrum from a limonene enantiomer depends on the combination of the chirality of the enantiomer and the rotation direction of the superimposed two-color laser field in comparison with that of an achiral atom, helium. From R-enantiomer, the harmonic orders with clockwise polarization were generated more efficiently than those with counterclockwise polarization and vice versa. CP-HHG can be a sensitive probe of the chirality of biomolecules on the femtosecond and attosecond timescales.

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“…The measured density of the magnetically driven jet was 1.9X10' cm at a backing pressure of 7 atm and that of the electrically driven jet was 1. 2X10' cm at a backing pressure of 9 atm [21]. The generated harmonics went through the 100-pm-wide slit.…”

Section: Harmonic Generationmentioning

confidence: 99%

High-order harmonic generation and ionization using ultrashort KrF and Ti:sapphire lasers

et al. 1994

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High-order harmonic generation with KrF and Ti:sapphire lasers is analyzed with an emphasis on the contribution of multiply charged ions. It is confirmed that the intensity dependence of strong optical field ionization is explained by the Ammosov-Delone-Krainov (ADK) theory or by the barrier suppression ionization model regardless of the wavelength. The harmonic distributions are compared with the single-atom responses calculated using the short-range potential model with the efective interaction intensity determined by the ADK theory. From this analysis, we propose that for the KrF laser the harmonics above the 21st in Ne and above the 13th in Ar may be due to doubly charged ions.PACS number(s): 32.80. Rm, 51.70.+f, 42.65.Ky

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Gas density measurement of pulsed gas jets using XeF four-photon fluorescence induced by a KrF laser

Cited by 15 publications

References 9 publications

Coherent control of frequency conversion toward short (picosecond) vacuum-ultraviolet radiation pulses

Coherent control of frequency conversion toward short (picosecond) vacuum-ultraviolet radiation pulses

Circular dichroism in high-order harmonic generation from chiral molecules

High-order harmonic generation and ionization using ultrashort KrF and Ti:sapphire lasers

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