摘要
本文报告HD+离子在波长λ=306.7nm的三倍频超短脉冲弱光场E3和不同延时的二倍频超短脉冲强光场E2作用下解离几率分布的定量计算结果.E3和E2的脉冲宽度均为10fs.E3先行,E2延时取0、4、8、12、16、20、24、28fs.计算结果用三维图表出.图中看到,沿相对动量坐标有三个峰,分别位于动量2.1×10-18、4.4×10-18、5.8×10-18g·cm/s处,依次称为1号峰、2号峰、3号峰,位置各是λ=306.7nm的单光子能量、双光子能量、三光子能量消耗于解离能之后离子碎片具有相对动量.据分析,1号峰来源于E2场引起的受激发射作用.
In this paper it is presented the quantitative calculation results of the dissociaton probability distribution of HD + ion in weak and strong ultrashort pulsed laser fields:E 3 and E 2,which are the frequency tripled and doubled fields of wavelength λ=306 7nm laser,respectively.Both of the pulse widths are 10fs.E 2 follows E 3.The time delays are 0,4,8,12,16,20,24 and 28fs.The results are shown in two 3 dimensional plots.It is seen in them that there are three peaks at 2 1×10 18 ,4 4×10 -18 and 5 8×10 18 g·cm/s in the dimension of the relative momentum,refered as No.1,No,2 and No.3 peaks,whose coordination values are the relative momenta of the dissociation fragments correspondig to one photon ,two photon and three photon energies of the λ=306 7nm field minus the dissociation energy.By analysis,the stimulated emission by E 2 results in the No.1 peak.
出处
《光子学报》
EI
CAS
CSCD
1999年第1期17-20,共4页
Acta Photonica Sinica
基金
国家自然科学基金