Figure 4: Detected photocurrent as a function of the incident polarization and OAMs.
From: Holographic detection of the orbital angular momentum of light with plasmonic photodiodes
Photocurrent is measured for two different holographic photodiodes, one patterned with a classical plasmonic lens (Fig. 3d, Lg=0) that focuses a Gaussian beam (a) and the other with a plasmonic lens (Fig. 3c, Lg=1) that focuses a vortex beam with Li=−1 (b). Each colour denotes a vortex beam incident with a different topological charge. The inset shows the orientation of the polarization of the incident electric field with respect to the grooves.
