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Figure 3
Top: interference pattern given by modes propagating in the guiding layer with lateral dimensions deff equal to (a) 108 nm, (b) 176 nm, (c) 241 nm, (d) 305 nm. The color bar indicates intensity in a.u. Bottom: modal structure of the field propagated in the WG found as a Fourier transform of the field with respect to the optical axis of the waveguide (axis 0Z) for the same vacuum gaps: (e) 108 nm, (f) 176 nm, (g) 241 nm, (h) 305 nm. As in the previous figure the incident photon energy was Einc = 8 keV, the WG length L = 4 mm and the grating period P = 200 µm

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 20| Part 5| July 2013| Pages 691-697
doi:10.1107/S0909049513018657
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