Fig. 2
From: Vectorizing the spatial structure of high-harmonic radiation from gas
Experimental setup for measuring XUV polarization using an XUV polarizer. The linearly polarized driving laser beam is prepared by going through a half-wave plate, a designed phase plate shown in Fig. 1a and a quarter-wave plate to convert into circular state. It is then focused by a 30 cm lens into a vacuum chamber to interact with argon noble gas. The generated XUV radiation propagates through a XUV linear polarizer placed 50 cm from the gas jet and in the far field for the XUV light. The reflectivity of a silver mirror in the XUV is polarization dependent. With a 23-degree angle of incidence to a pair of silver mirrors we construct a XUV polarizer in front of a XUV spectrometer to select one linearly polarized state
