Modification and Dynamics inside Diamond by Femtosecond Laser Double-Pulse Irradiation

被引：7

作者：

Sakakura, Masaaki ^{[1
]}

Okada, Takuro ^{[2
]}

Bharadwaj, Vibhav ^{[3
,4
]}

Sotillo, Belen ^{[3
,4
]}

Eaton, Shane M. ^{[3
,4
]}

Ramponi, Roberta ^{[3
,4
]}

Serpenguzel, Ali ^{[5
]}

Gokay, Ulas S. ^{[5
]}

Shimotsuma, Yasuhiko ^{[2
]}

Miura, Kiyotaka ^{[2
]}

机构：

[1] Kyoto Univ, Off Soc, Acad Collaborat Innovat, Kyoto 6158245, Japan

[2] Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Kyoto, Japan

[3] Politecn Milan, CNR, IFN, Milan, Italy

[4] Politecn Milan, Dipartimento Fis, Milan, Italy

[5] Koc Univ, Dept Phys, Microphoton Res Lab, Istanbul, Turkey

来源：

JOURNAL OF LASER MICRO NANOENGINEERING | 2016年 / 11卷 / 03期

基金：

日本学术振兴会;

关键词：

femtosecond laser; diamond; bulk processing; dynamics; crystal; INTERFEROMETRY; CRYSTALS; GLASS;

D O I：

10.2961/jlmn.2016.03.0012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigated modifications and the temporal evolution of the morphology in the photoexcited region inside diamond single crystal after photoexcitation by tightly focused fs laser pulses. We found that double-pulse irradiation with 200-400 fs laser pulses was able to induce a permanent modification in the photoexcited region, while single-pulse irradiation with 100-300 fs laser pulses was not. The modification by double-pulse irradiation became larger for a longer time-difference between the two pulses in the range from 1 ps to 10 ps. The morphology change observed by a pump-probe optical microscope showed that the photoexcited region by double-pulse irradiation was smaller than by single-pulse irradiation, even for the same total pulse energy, with the amplitudes of the laser induced-stress waves being the same. This observation suggests that the photoinduced plasmas by double-pulse irradiation was localized in a smaller region than that by single-pulse irradiation, and the difference in plasma distribution could be the origin of the permanent modification.

引用

页码：346 / 351

页数：6

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