Fig. 1. Typical structure of pseudospark switch

Fig. 2. Relationship between maximum initial kinetic energy and laser frequency

Fig. 3. Simulation results of pulse discharge based on laser-triggered pseudospark

Fig. 4. Negative high voltage test circuit and physical picture

Fig. 5. Schematic diagram of non-focused mode

Fig. 6. Pulse discharge waveform of laser-triggered pseudospark（non-focused；by 266 nm and 532 nm laser beams）

Fig. 7. The pulse discharge waveforms of laser-triggered pseudospark（focused；by 266 nm and 532 nm laser beams）

Fig. 8. The schematic diagram of focused mode