Naslov
Identification of Atomic Resonances for Enhancement of High Harmonic Generation in Laser- Produced Plasmas

Autori
Stefanuik, Robert ; Krstulovic, Niksa ; Mahmoad, Mahmoad ; Dunne, Padraig ; O’Sullivan, Gerry

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings on 2012 International Workshop on EUV and Soft X-Ray Sources / Vivek Bakshi - , 2012, 12-12

Skup
2012 International Workshop on EUV and Soft X-Ray Sources

Mjesto i datum
Dublin, Irska, 08.10.2012. - 11.10.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
High Harmonic Generation; Laser Produced Plasma; Atomic Resonances

Sažetak
In recent years the generation of high harmonic radiation (HHG) in laser produced plasmas has been reported. One of the noteworthy features of this process is the enhancement of harmonics that coincide with resonances in the spectrum of atoms or ions in the plasma [1]. We report on the potential of new, wide resonances in the 40 nm region of a range of elements suitable for the enhanced HHG of the 19th or 21st harmonic of a Ti:Sapphire laser. The laser has a central wavelength of 800 nm, pulse energy of 30 mJ and pulse duration of 30 fs. The resonances were observed using the dual-laser photoabsorption technique using a 1 m normal incidence spectrometer which is sensitive in the 20-200 nm region [2]. Using the Time Dependent Local Density Approximation (TDLDA) the resonance cross sections were calculated for comparison with experimental results. These wavelengths are of interest for surface studies in materials science [3]. References [1] R.A Ganeev, Harmonic generation in laser- produced plasmas containing atoms, ions and clusters: a review, Journal of Modern Optics 59:5, 409-439 [2] D.A. LIBERMANI, A.Zangwill “A Relativistic Program For Optical Response In Atoms Using A Time Dependent Local Density Approximation.” Computer Physics Communications 32 (1984) 75-82 North-Holland, Amsterdam [3] T. Higashiguchi et al Characteristics of extreme ultraviolet emission from a discharge- produced potassium plasma for surface morphology application APPLIED PHYSICS LETTERS 96, 131505 2010

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
The 2012 Source Workshop was held Oct. 8-11 in Dublin, Ireland, in the Clinton Auditorium on the campus of University College Dublin. This is the industry’s largest annual gathering of EUV and soft X-ray source experts, who took the opportunity to discuss the latest results from their labs.

POVEZANOST RADA