Filament-based stimulated Raman spectroscopy

Abstract

A new multiplexed stimulated Raman spectroscopic technique encompassing a single-shot spectral measurement range of over 3900 cm -1 is presented. Impulsive excitation of all Raman active vibrational modes present in a medium is achieved by self-compression of a laser pulse undergoing filamentation in air, creating coherent vibrational wave-packets. These wave-packets create a macroscopic polarization of the medium that imparts sidebands on a delayed narrowband probe pulse. The background-free measurement of impulsively excited Raman modes in gas-phase N 2 , O 2 , H 2 , CO 2 , toluene, ammonia, and chloroform with a spectral resolution of 25 cm -1 is presented.

Accurate and Compatible Force Fields for Molecular Oxygen, Nitrogen, and Hydrogen to Simulate Gases, Electrolytes, and Heterogeneous Interfaces

“…The LJ parameters for O, N, and H in O 2 , N 2 , and H 2 molecules are furthermore of the same order of magnitude as the LJ parameters of the same atoms in water, S1). Experimental data from Odhner, 53 Arora, 54 Ehlerding, 55 and Centrone. 56 aromatic N-heterocycles, hydrocarbons, and other organic compounds.…”

“…For H 2 with 9-6 IFF parameters, the different sets (A, B, C) do not change the peak position (FigureS1). Experimental data from Odhner,53 Arora,54 Ehlerding,55 and Centrone 56.…”

In-Situ Photo-Dissociation and Polymerization of Carbon Disulfide with Vacuum Ultraviolet Microplasma Flat Lamp for Organic Thin Films

“…The sharp transition at~2336 cm −1 arises from ambient nitrogen (molecular) gas (Q-branch) [24,25] and the peak at 1586 cm −1 is assigned as ambient O 2 scattering. Both peaks are found due to the atomospheric scattering by the collimated probing laser beam at the substrate, as notated in Figure 5c [26].…”

“…2021, 11, x FOR PEER REVIEW at 1586 cm −1 is assigned as ambient O2 scattering. Both peaks are f spheric scattering by the collimated probing laser beam at the sub ure 5c [26]. The chemical bondings formed in the deposited films after V vestigated by XPS.…”

5.2.2 Entwicklung eines Hochdruckprüfstands für NDIR-Messungen zur Verunreinigungsbestimmung in Wasserstoff für Drücke bis 900 bar

“…Diese H 2 -Bande tritt bei einem Druck von 33 bar zum ersten Mal deutlich auf. Dies deckt sich auch mit [15]. Eine weitere H 2 -Bande beginnt unterhalb von ~2000 cm -1 und geht über 1000 cm -1 hinaus.…”