Raman-Microsampling Technique Applying Optical Levitation by Radiation Pressure

Authors: Thurn, R.; Kiefer, W.

Source: Applied Spectroscopy, Volume 38, Issue 1, Pages 1-92 (January/February 1984) , pp. 78-83(6)

Publisher: Society for Applied Spectroscopy

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Abstract:

We report on a new Raman microprobe technique where micron-sized solid particles are trapped in stable optical potential wells using only the force of radiation pressure from a continuous gas laser. We demonstrate this technique with Raman spectra from spherical and non-spherical particles of sizes ranging between 10-30 μm. The particles are stably supported by a vertical directed focused TEM₀₀-mode cw argon ion laser of ~500 mW. The latter simultaneously serves as the exciting light source. Several suggestions for improvements of this technique are made.

Keywords: Raman microprobe; Raman spectroscopy; Techniques, spectroscopic

Document Type: Research article

DOI: http://dx.doi.org/10.1366/0003702844554440

Affiliations: 1: Physikalisches Institut, Universität Bayreuth, Federal Republic of Germany

Publication date: 1984-01-01

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