Abstract
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 language | English (US) |
|---|---|
| Pages (from-to) | 2964-2970 |
| Number of pages | 7 |
| Journal | Optics Express |
| Volume | 21 |
| Issue number | 3 |
| DOIs | |
| State | Published - Feb 11 2013 |
| Externally published | Yes |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
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Løvhaugen, P., Ahluwalia, B. S., Huser, T. R., & Hellesø, O. G. (2013). Serial Raman spectroscopy of particles trapped on a waveguide. Optics Express, 21(3), 2964-2970. https://doi.org/10.1364/OE.21.002964