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Plasma Generation in Air by Intense Laser Pulses with Various Pulse Durations |
| QIN Yuan-dong;YANG Hong;WANG Shu-feng;ZHU Chang-jun;GONG Qi-huang |
| Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871 |
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| Cite this article: |
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QIN Yuan-dong, YANG Hong, WANG Shu-feng et al 1999 Chin. Phys. Lett. 16 580-582 |
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Abstract We have studied the plasma generation through collecting the charged particles produced in laser-induced break-down in atmospheric air. This breakdovn is produced by ultrashort laser pulses with various durations ranging from 200fs to 2ps at a fixed pulse energy of 8mJ. We found that the plasma yield increases first with the increment of pulse duration and then reaches a plateau at a duration longer than 500fs. The generated plasma temperature is estimated to be higher than 5x 105 K .
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| Keywords:
52.50.Jm
42.65.Re
33.80.Rv
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Published: 01 August 1999
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| PACS: |
52.50.Jm
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(Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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33.80.Rv
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(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))
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