Figure 3
From: Topological charge of soft X-ray vortex beam determined by inline holography
(a,b) Inline holography for Hermite–Gauss states \(\hbox {HG}_{0,1}\) and \(\hbox {HG}_{1,1}\). Schematic of the gratings for producing \(\hbox {HG}_{0,1}\) and \(\hbox {HG}_{1,1}\) states (first column). Insets show enlarged views around the center of the gratings. holographic images for the diffraction waves from these gratings (second column), \(A(\rho _{fn}, \phi _{fn})\) (third column) and the phase distribution (fourth column) for the \(n = +1\) diffraction, and the simulated phase distribution (fifth column). (c) TC spectra for the \(\hbox {HG}_{0,1}\) and \(\hbox {HG}_{1,1}\) states; figure (d) shows that these states can be decomposed into two LG states.
