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. 2023 Feb 9;14:707. doi: 10.1038/s41467-023-36418-y

Fig. 4. Far-field characterization of the CV beam.

Fig. 4

a Experimental setup for the far-field beam measurements. The diverged CV beam is collimated by a focal lens, and probed by a Golay cell THz detector mounted on a mechanical stage. b, c Numerically calculated and experimentally obtained intensity profiles. d, e Results obtained by inserting a wire-grid polarizer between the focal lens and THz detector, with polarization angles of 45° and 135° respectively. Left panels: polarization-resolved emission spectra. Right panels: numerically calculated (upper) and experimentally measured (lower) intensity patterns.