论文标题
激光诱导的钻石在30 FS激光脉冲辐照下的抽样
Laser-Induced Graphitisation of Diamond Under 30 fs Laser Pulse Irradiation
论文作者
论文摘要
已经研究了从SP3键到SP2键的碳分数中的激光诱导的绘画，在不同的超短脉冲激光器（30 FS，800 nm，1 kHz）的无数流量下沉积的单晶化学蒸气（CVD）钻石的程度。发现四面体CVD SP3相过渡到主要是3.9 J/CM2以下的SP2-芳族晶体石墨级分，上面主要是形成无定形碳。由于与FS-LASER辐照相关的非线性相互作用，因此从3.3 j/cm2增加到3.3 j/cm2增加到3.9 j/cm2（〜20％），SP2塑形区域的深度大大增加（〜3倍）。另外，在临界阈值平均下方观察到C = O羰基的形成。 C = O裂解逐渐发生，随着30 FS激光的辐射通量的增加。讨论了这些发现对增强FS驱动钻石加工的影响。
The degree of laser-induced graphitisation from a sp3-bonded to a sp2-bonded carbon fraction in a single crystal chemical vapour deposited (CVD) diamond under a varying fluence of an ultrashort pulsed laser (30 fs, 800 nm, 1 kHz) irradiation has been studied. The tetrahedral CVD sp3-phase was found to transition to primarily an sp2-aromatic crystalline graphitic fraction below the critical fluence of 3.9 J/cm2, above which predominantly an amorphous carbon was formed. A fractional increase of fluence from 3.3 J/cm2 to 3.9 J/cm2 (~ 20 %) resulted in a substantial (~ three-fold) increased depth of the sp2-graphitised areas owing to the non-linear interactions associated with an fs-laser irradiation. Additionally, formation of C=O carbonyl group was observed below the critical threshold fluence; the C=O cleavage occurred gradually with the increase of irradiation fluence of 30 fs laser light. The implications for these findings on enhancement of fs-driven processing of diamond are discussed.
