Bright High-Order Harmonic Generation From Long Gas Jets Toward Coherent Soft X-Ray Applications

Kim, H.T.; Kim, I.J.; Toşa, V.; Kim, C.M.; Park, J.J.; Lee, Y.S.; Bartnik, A.; Fiedorowicz, Henryk; Nam, Chang Hee

doi:10.1109/jstqe.2004.837739

Cited by 9 publications

(5 citation statements)

References 25 publications

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“…It is common for researchers working in this field to infer the relative jet position based on the divergence of HHG radiation. It was recently shown [10,32,33] that there are conditions where a low divergence XUV beam can be produced from focal positions where we would normally expect divergent long trajectory harmonics. Moving forward, it will be important to have a clear measurement of the position of the jet with respect to the focus.…”

Section: Discussionmentioning

confidence: 99%

High harmonic cutoff energy scaling and laser intensity measurement with a 1.8 μm laser source

Shiner

Trallero–Herrero

Kajumba

et al. 2013

Journal of Modern Optics

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High harmonic generation in gas targets leads to the production of attosecond pulses. The process of high harmonic generation requires that the gas be ionized by an intense femtosecond laser field. The highest photon energy produced is related to the laser intensity times the wavelength squared. This cutoff is reached only if good phase matching is achieved. Using a laser with a wavelength of 1800 nm, we estimate the laser intensity in the gas jet by recording the ion yield, and simultaneously record the high harmonic spectrum. We show that the cutoff energy matches the measured intensity, confirming that good phase matching is achieved to 100 eV. We also use the ion collector to characterize the spatial size of the gas jet and to measure the confocal parameter of the laser beam, parameters that are useful for numerical modelling.

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Section: Discussionmentioning

confidence: 99%

High harmonic cutoff energy scaling and laser intensity measurement with a 1.8 μm laser source

Shiner

Trallero–Herrero

Kajumba

et al. 2013

Journal of Modern Optics

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“…HHG is one of the most promising methods to obtain tunable, short-pulse, coherent radiation in the SXR and EUV regions [31], however, efficient harmonic generation requires phase matching between generated harmonics and driving laser pulse, as well as an efficient coupling of an intense laser pulse with a large number of atoms. These conditions can be fulfilled by harmonic generation in a hollow-core fibre [32,33] and elongated gas-jet targets [34][35][36], however, ionization of gas prevents the laser pulse propagation and limits efficient HHG. It was theoretically demonstrated that quasi-phase-matching (QPM) of high-order harmonic generation in gases with modulated density may strongly increase harmonic generation efficiency [37][38][39][40].…”

Section: Euv Imaging Of Modulated Density Gas Puff Targets Using Shadmentioning

confidence: 99%

Extreme ultraviolet and soft X-ray imaging with compact, table top laser plasma EUV and SXR sources

Wachulak

Bartnik

Kostecki

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…For the experiments a special elongated gas puff target has been developed at the Military University of Technology. The target was used for generation of bright and low divergence high harmonics in the collaborative experiments [19,20].…”

Section: Future Plansmentioning

confidence: 99%

Imaging and Patterning on Nanometer Scale Using Coherent EUV Light

et al. 2010

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Extreme ultraviolet (EUV) covers wavelength range from about 5 nm to 50 nm. That is why EUV is especially applicable for imaging and patterning on nanometer scale length. In the paper periodic nanopatterning realized by interference lithography and high resolution holographic nanoimaging performed in a Gabor in-line scheme are presented. In the experiments a compact table top EUV laser was used. Preliminary studies on using a laser plasma EUV source for nanoimaging are presented as well.

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Bright High-Order Harmonic Generation From Long Gas Jets Toward Coherent Soft X-Ray Applications

Cited by 9 publications

References 25 publications

High harmonic cutoff energy scaling and laser intensity measurement with a 1.8 μm laser source

High harmonic cutoff energy scaling and laser intensity measurement with a 1.8 μm laser source

Extreme ultraviolet and soft X-ray imaging with compact, table top laser plasma EUV and SXR sources

Imaging and Patterning on Nanometer Scale Using Coherent EUV Light

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