Whispering Gallery Mode Spectroscopy as a Diagnostic for Dusty Plasmas

Journal Article · Sun Sep 07 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2997102· OSTI ID:21251276

Thieme, G; Basner, R; Ehlbeck, J; Roepcke, J ^[1]; Maurer, H ^[1]; Kersten, H ^[2]; Davies, P B ^[3]

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1. INP Greifswald, Felix-Hausdorff-Str. 2, D-l7489 Greifswald (Germany)
2. IEAP Kiel, Leibnitzstr. 19, D-24118 Kiel (Germany)
3. Department of Chemistry, University of Cambridge, Cambridge CB2 1EW (United Kingdom)

Whispering-gallery-mode spectroscopy is being assessed as a diagnostic method for the characterisation of size and chemical composition of spherical particles levitated in a plasma. With a pulsed laser whispering gallery modes (cavity resonances) are excited in individual microspheres leading to enhanced Raman scattering or fluorescence at characteristic wavelengths. This method can be used to gain specific information from the particle surface and is thus of great interest for the characterisation of layers deposited on microparticles, e.g. in molecular plasmas. We present investigations of different microparticles in air and results from fluorescent particles levitated in an Argon rf plasma.

• OSTI ID: 21251276
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1041; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON IONS
DRIFT INSTABILITY
FLUORESCENCE SPECTROSCOPY
GAIN
MAGNETOHYDRODYNAMICS
MICROSPHERES
PLASMA
PLASMA DIAGNOSTICS
PLASMA WAVES
RAMAN EFFECT
RAMAN SPECTROSCOPY
RF SYSTEMS