Serial Raman spectroscopy of particles trapped on a waveguide

Pål Løvhaugen, Balpreet Singh Ahluwalia, Thomas R Huser, Olav Gaute Hellesø

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


We demonstrate that Raman spectroscopy can be used to characterize and identify particles that are trapped and propelled along optical waveguides. To accomplish this, microscopic particles on a waveguide are moved along the waveguide and then individually addressed by a focused laser beam to obtain their characteristic Raman signature within 1 second acquisition time. The spectrum is used to distinguish between glass and polystyrene particles. After the characterization, the particles continue to be propelled along the straight waveguide. Alternatively, a waveguide loop with a gap is also investigated, and in this case particles are held in the gap for characterization before they are released.

Original languageEnglish (US)
Pages (from-to)2964-2970
Number of pages7
JournalOptics Express
Issue number3
StatePublished - Feb 11 2013
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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