Trapped Rainbow Techniques for Spectroscopy on a Chip and Fluorescence Enhancement
arXiv:1101.3366 · doi:10.1007/s00340-011-4856-x
Abstract
We report on the experimental demonstration of the broadband "trapped rainbow" in the visible range using arrays of adiabatically tapered optical nano waveguides. Being a distinct case of the slow light phenomenon, the trapped rainbow effect could be applied to optical signal processing, and sensing in such applications as spectroscopy on a chip, and to providing enhanced light-matter interactions. As an example of the latter applications, we have fabricated a large area array of tapered nano-waveguides, which exhibit broadband "trapped rainbow" effect. Considerable fluorescence enhancement due to slow light behavior in the array has been observed.
15 pages, 4 figures, Published in Applied Physics B