Mechanisms of ultrafast laser-induced deep-subwavelength gratings on graphite and diamond

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 强场激光物理国家重点实验室

	Mechanisms of ultrafast laser-induced deep-subwavelength gratings on graphite and diamond
	Huang Min ; Zhao Fuli ; Cheng Y(程亚) ; Xu Ningsheg ; Xu ZZ(徐至展)
刊名	phys. rev. b
	2009
卷号	79 期号:12 页码:125436
关键词	diamond diffraction gratings excited states graphite high-speed optical techniques laser beam effects surface states
ISSN号	1098-0121
中文摘要	deep-subwavelength gratings with periodicities of 170, 120, and 70 nm can be observed on highly oriented pyrolytic graphite irradiated by a femtosecond (fs) laser at 800 nm. under picosecond laser irradiation, such gratings likewise can be produced. interestingly, the 170-nm grating is also observed on single-crystal diamond irradiated by the 800-nm fs laser. in our opinion, the optical properties of the high-excited state of material surface play a key role for the formation of the deep-subwavelength gratings. the numerical simulations of the graphite deep-subwavelength grating at normal and high-excited states confirm that in the groove the light intensity can be extraordinarily enhanced via cavity-mode excitation in the condition of transverse-magnetic wave irradiation with near-ablation-threshold fluences. this field enhancement of polarization sensitiveness in deep-subwavelength apertures acts as an important feedback mechanism for the growth and polarization dependence of the deep-subwavelength gratings. in addition, we suggest that surface plasmons are responsible for the formation of seed deep-subwavelength apertures with a particular periodicity and the initial polarization dependence. finally, we propose that the nanoscale coulomb explosion occurring in the groove is responsible for the ultrafast nonthermal ablation mechanism.
学科主题	激光技术;激光物理与基本理论
资助信息	shanghai institute of optics and fine mechanics (siom) ; chinese academy of sciences (cas)
语种	英语
WOS记录号	WOS:000264769300117
公开日期	2009-09-18
内容类型	期刊论文
源URL	[http://ir.siom.ac.cn/handle/181231/656]
专题	上海光学精密机械研究所_强场激光物理国家重点实验室
推荐引用方式 GB/T 7714	Huang Min,Zhao Fuli,Cheng Y,et al. Mechanisms of ultrafast laser-induced deep-subwavelength gratings on graphite and diamond[J]. phys. rev. b,2009,79(12):125436.
APA	Huang Min,Zhao Fuli,程亚,Xu Ningsheg,&徐至展.(2009).Mechanisms of ultrafast laser-induced deep-subwavelength gratings on graphite and diamond.phys. rev. b,79(12),125436.
MLA	Huang Min,et al."Mechanisms of ultrafast laser-induced deep-subwavelength gratings on graphite and diamond".phys. rev. b 79.12(2009):125436.