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Laser-induced alteration of Raman spectra for micron-sized solid particles

Böttger, Ute and Pavlov, S.G. and Deßmann, N. and Hanke, Franziska and Weber, I. and Fritz, J. and Hübers, Heinz-Wilhelm (2016) Laser-induced alteration of Raman spectra for micron-sized solid particles. Planetary and Space Science, 138, pp. 25-32. Elsevier. doi: 10.1016/j.pss.2017.02.001. ISSN 0032-0633.

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Official URL: http://www.sciencedirect.com/science/article/pii/S0032063316301027


The Raman Laser Spectrometer (RLS) instrument on board of the future ESAs ExoMars mission will analyze micron-sized powder samples in a low pressure atmosphere. Such micron-sized polycrystalline solid particles might be heated by the laser during the Raman measurements. Here, we report on the temperature-induced alteration of Raman spectra from micron-sized polycrystalline solid particles by comparing Raman spectra on silicon and the rock forming minerals olivine and pyroxene taken at different laser intensities and different ambient temperatures. Our analyses indicate that laser-induced heating results in both broadening and shifting of characteristic Raman lines in the Stokes and anti-Stokes spectral regions. For elementary crystalline silicon a significant local temperature increase and relevant changes in Raman spectra have been observed in particles with median sizes below 250 μm. In comparison, significantly weaker laser-induced Raman spectral changes were observed in more complex rockforming silicate minerals; even for lower grain sizes. Laser power densities realized in the RLS ExoMars instrument should cause only low local heating effects and, thus, negligible frequency shifts of the major Raman lines in common silicate minerals such as olivine and pyroxene.

Item URL in elib:https://elib.dlr.de/107975/
Document Type:Article
Title:Laser-induced alteration of Raman spectra for micron-sized solid particles
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Böttger, Uteinstitut für optische sensorsysteme, dlr, berlinUNSPECIFIEDUNSPECIFIED
Pavlov, S.G.institut für optische sensorsysteme, dlr, berlinUNSPECIFIEDUNSPECIFIED
Hanke, Franziskainstitut für optische sensorsysteme, dlr, berlinUNSPECIFIEDUNSPECIFIED
Weber, I.institut für planetologie, wwu münster, germanyUNSPECIFIEDUNSPECIFIED
Fritz, J.naturkundemuseum, berlinUNSPECIFIEDUNSPECIFIED
Hübers, Heinz-Wilhelmdlr, institut für optische sensorsystemeUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 25-32
Keywords:Raman spectroscopy; ExoMars mission; laser induced alteration; micron-sized solid particles
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Böttger, Dr.rer.nat. Ute
Deposited On:06 Feb 2017 10:24
Last Modified:06 Nov 2023 08:50

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