Browsing by Author "Li, Zehan"

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Ultrafast UV laser induced dynamics in dielectric coating materials before laser damage
(2014-01-01)
Du, Juan
;
Li, Zehan
;
Kobayashi, Takayoshi
;
Zhao, Yuanan
;
Leng, Yuxin
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.