Fig. 3
Manipulation of dichromatic photon momentum. a, b Experimental angular dichromatic patterns obtained from Au nanoantenna at the size of 400 nm × 70 nm. Stimulation positions are located at the upper-left corner, upper-right corner, center of the lower edge, and center of the nanoantenna, which are marked by red points on the pseudo-color SEM image of the Au nanoantenna as shown in a. c Simulated angular patterns of the Au nanoantenna. Electron beam stimulation positions are the same as in a. d Scattering ratio of the red component in different region detection. Electron beam excitation positions are the same as in a. e Intensity ratio (ρ) of the red component with different region detection. The definition of intensity ratio (ρ) is the same as in Fig. 1h. Electron beam impinging positions are the same as in a
