Ultrafast UV laser induced dynamics in dielectric coating materials before laser damage

Juan Du; Zehan Li; Takayoshi Kobayashi; Yuanan Zhao; Yuxin Leng

doi:10.1117/12.2073613

22 September 2014 Ultrafast UV laser induced dynamics in dielectric coating materials before laser damage

Juan Du, Zehan Li, Takayoshi Kobayashi, Yuanan Zhao, Yuxin Leng

Proceedings Volume 9238, Pacific Rim Laser Damage 2014: Optical Materials for High-Power Lasers; 923805 (2014) https://doi.org/10.1117/12.2073613
Event: Pacific-rim Laser Damage, 2014, Yokohama, Japan

Abstract

The laser induced ultrafast dynamics in fused silica under few-cycle UV laser excitation is investigated in the present study. Using sub-10 fs UV laser pulses, we characterize the free carrier dynamics in the fused silica before laser damage. After laser excitation, free carrier in the conductive band is found to turn into self-trapped excitons within about 300fs. It is possible that the trapped exciton will result in the incubation effect under the condition of ultrafast high-frequency pulsed UV laser exposure.

Citation Download Citation

Juan Du, Zehan Li, Takayoshi Kobayashi, Yuanan Zhao, and Yuxin Leng "Ultrafast UV laser induced dynamics in dielectric coating materials before laser damage", Proc. SPIE 9238, Pacific Rim Laser Damage 2014: Optical Materials for High-Power Lasers, 923805 (22 September 2014); https://doi.org/10.1117/12.2073613

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