Shifted Excitation Raman Difference Spectroscopy applied to extraterrestrial particles returned from the asteroid Itokawa

U. Böttgera, M. Maiwaldb, F. Hankea,c, M. Brauneb, S.G. Pavlova, S. Schrödera, I. Weberd, H. Busemanne, B. Sumpfb, G. Tränkleb, H.-W. Hübersa,c

Published in:

Planet. Space Sci., vol. 144, pp. 106-111 (2017).

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Two extraterrestrial particles from the asteroid Itokawa are investigated applying Shifted Excitation Raman Difference Spectroscopy (SERDS). These particles were returned by the Hayabusa mission of the Japanese Space Agency JAXA. For SERDS a diode laser based microsystem light source at 488 nm is used for excitation. It has been found that fluorescence signals masking the Raman spectral features of interest can be substantially separated by applying SERDS. Therefore, SERDS improves the information obtained from the Raman spectra and enables a reliable analysis for investigations on extraterrestrial samples.

a Institute of Optical Sensor Systems, German Aerospace Center (DLR), Rutherfordstr. 2, 12489 Berlin, Germany
b Ferdinand-Braun-Institut, Leibniz Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Strasse 4, 12489 Berlin, Germany
c Humboldt-Universität zu Berlin, Institut für Physik, Newtonstr. 15, 12489 Berlin, Germany
d Institut für Planetologie, Wilhelm-Klemm-Str. 10, WWU Münster, 48149 Münster, Germany
e ETH Zürich, Institut für Geochemie und Petrologie, Clausiusstrasse 25, 8092 Zürich, Switzerland

Ocis codes:

(300.6450) Spectroscopy, Raman; (300.6360) Spectroscopy, laser; (180.1790) Confocal microscopy; (180.5655) Raman microscopy; (140.5960) Semiconductor lasers; (140.3490) Lasers, distributed feedback; (140.3515) Lasers, frequency doubled; (060.2420) Fibers, polarization-maintaining; (060.3735) Fiber Bragg gratings.