Figure 1 | Graphical depiction of the generalized Smith-Purcell effect. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 1 | Graphical depiction of the generalized Smith-Purcell effect.

Caption

Figure 1 | Graphical depiction of the generalized Smith-Purcell effect. An electron beam passing over a nanoscale array (here represented by metallic disks of different sizes) can make each element emit light (known as cathodoluminescence). The overall collective emission by the full array is constructive along a few discrete angular directions. By programming the response of the elements, the emitted cathodoluminescence can be steered into selected directions.

Credit

Eduardo J. C. Dias et al.

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CC BY

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