Original Articles |
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Sub-diffraction-Limit Voids in Bulk Quartz Induced by
Femtosecond Laser Pulses |
WANG Dan-Ling;LI Cheng-De;LUO Le;YANG Hong;GONG Qi-Huang |
National Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 |
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Cite this article: |
WANG Dan-Ling, LI Cheng-De, LUO Le et al 2001 Chin. Phys. Lett. 18 65-67 |
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Abstract When a powerful femtosecond laser pulse was tightly focused into a bulk quartz, plasma generation occurred only in a very small focal volume. This extremely confined interaction led to an explosive expansion and generated a sub-micrometre void with a diameter as small as 200-300nm. The dependence of the size of the void on the laser energy or pulse duration was investigated and the mechanism of this process was associated dominantly with the multiphoton ionization.
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Keywords:
42.65.-k
42.70.Ce
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Published: 01 January 2001
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