Figure 1 | Scientific Reports

Figure 1

From: Fabricating THz spiral zone plate by high throughput femtosecond laser air filament direct writing

Figure 1

Schematic diagrams of the experimental setup for fabricating (a) and characterizing (b) SZPs. In (b), S represents a 0.1 THz light source (IMPATT diodes, Terasense Inc.) with an output power of 95 mW, and D represents a THz detector (WR-10 ZBD, Virginia Diodes Inc.) with a frequency detecting range of 75–110 GHz, which is mounted on a 2D stepper motor driving translation stage.

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