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Questions related from Pengji Ding
It is simply to convert mg/m3 to ppm for gaseous molecule if knowing its molecular weight. But for the soot particle, I could not find a relationship between these two units.
12 February 2023 4,848 2 View
I know it must be less than 1 ps, but anyone have a more precise knowledge about it?
11 April 2017 9,755 8 View
Recently, I focus on the photon echo experiments in molecular gas. And surprisely there are no many literatures about this kind of experiments. So if someone has experience on this field, please,...
05 May 2015 6,930 0 View
The photoionization process generates free electrons which possess enough kinetic energy to dissociate the neutral molecules, like nitrogen molecules and oxygen molecules in air. I want to know...
23 January 2015 9,867 2 View
We generated an ultrashort but weak laser pulse from plasma, and we observed its interference patterns by using Mechelson interferometer. If we want to know its duration or width, how to extract...
16 January 2015 9,685 14 View
Could someone describe the initial state of the evolution of a population inverted system to a superradiant state?
24 July 2014 2,811 3 View
From the experiment, the ellipticity and intensity of circularly polarized 800 nm laser have changed after it is reflected by a R800/T400 dichromatic beamsplitter. Could someone tell me how to...
11 July 2014 9,370 5 View
When the intense fs laser pulse is focused in air, it will generate a thin filament. If two filament-forming pulses spatial overlap and couple, one can observe energy exchange between two pulses...
18 June 2013 1,375 1 View
We experimentally observed that the dependence of energy exchange between a delay-tuned probe beam and two delay-fixed pump ones on the relative time delay could be extended to 100 picoseconds....
21 January 2013 8,950 5 View
