Figure 1 | Design of on-chip CRs and its photon momentum modulation function. (IMAGE)
Caption
Figure 1 | Design of on-chip CRs and its photon momentum modulation function. a Schematic of electron-induced CRs. Symmetrical Au nanoantenna under electron beam stimulation at the nanoantenna corner generates asymmetrical dichromatic dispersion radiation. b Experimental and simulated spectra obtained from Au nanoantenna. The blue (black) curve corresponds to the experimental (simulated) spectrum. The peak positions of green and red components are marked with arrows. c Schematic of dichromatic component analyzing. Four quarters from I to IV are introduced to detect dichromatic photon propagation directions. d Pseudo-color scanning electron microscopy image of a single Au nanoantenna. The stimulation position is located at the upper-right corner of the Au nanoantenna. e Scattering ratio of different angular quarter sphere detection, where the ratio value of the red (green) component is defined to be positive (negative) as a distinction. The error bar represents the uncertainty of the scattering ratio in multiple experiments. f Simulated angular patterns of green components and red components for signals. The nanoantenna size and stimulation position are the same as d. g Measured angular patterns of green (left) and red (center) components. The differential angular pattern is shown on the right. The axis in g is the same as in f. h Intensity ratio of the red and green components in each region. The error bar represents the uncertainty of the intensity ratio, which is extracted from multiple measurements.
Credit
by Cheng Chi, Zhibo Dang et al.
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CC BY