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) |
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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