Shaped-pulse optimization of coherent emission of high-harmonic soft X-rays

Abstract:

:When an intense laser pulse is focused into a gas, the light-atom interaction that occurs as atoms are ionized results in an extremely nonlinear optical process--the generation of high harmonics of the driving laser frequency. Harmonics that extend up to orders of about 300 have been reported, some corresponding to photon energies in excess of 500 eV. Because this technique is simple to implement and generates coherent, laser-like, soft X-ray beams, it is currently being developed for applications in science and technology; these include probing the dynamics in chemical and materials systems and imaging. Here we report that by carefully tailoring the shapes of intense light pulses, we can control the interaction of light with an atom during ionization, improving the efficiency of X-ray generation by an order of magnitude. We demonstrate that it is possible to tune the spectral characteristics of the emitted radiation, and to steer the interaction between different orders of nonlinear processes.

journal_name

Nature

journal_title

Nature

authors

Bartels R,Backus S,Zeek E,Misoguti L,Vdovin G,Christov IP,Murnane MM,Kapteyn HC

doi

10.1038/35018029

keywords:

subject

Has Abstract

pub_date

2000-07-13 00:00:00

pages

164-6

issue

6792

eissn

0028-0836

issn

1476-4687

journal_volume

406

pub_type

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