Fig. 1 (IMAGE)
Caption
Fig. 1. (a) THz optical path diagram based on metasurface. By controlling the phase delays of LCP and RCP waves by unit cells, metasurface can transmit the LCP and RCP components of the incident linearly polarized waves to the z-axis in different paths, and each point in a certain region on the z-axis collects the LCP and RCP waves generated by different unit cells respectively. The two kinds of circularly polarized waves are combined again to form linearly polarized waves, and the output linear polarization angle varies with the propagation distance. (b) The phase profile of Eq. (4) makes the output wave form Bessel beam; (c) Functional diagram of a longitudinally polarization variable device, where output linearly polarized THz waves rotate along the propagation path.
Credit
Jitao Li, Jingyu Liu, Zhen Yue, et al.
Usage Restrictions
Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted.
License
CC BY-NC-ND