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Figure 9
(a) Experimental layout for X-ray (8 keV) and optical (1.55 eV) sum frequency generation (SFG) in diamond. (b) X-ray signal versus energy analyzer angle. Inset: energy relative to 8 keV. The SFG energy exceeds the X-ray energy by one optical photon. (c) SFG signal versus X-ray/optical time delay. Black cross-correlation curve (2.5 ps full-width at half-maximum) solution of the wave equation for an 80 fs X-ray pulse and a 1.7 ps optical pulse. Inset: SFG signal versus optical intensity. The red line is a fit to a linear dependence on optical intensity. Reprinted by permission from Macmillan Publishers Ltd: Nature (Glover et al., 2012BB22), Copyright (2012).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 23| Part 1| January 2016| Pages 141-151
doi:10.1107/S1600577515019281
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