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(Color online) Schematic cross sections of the major fabrication steps.
(Color online) Pictures of waveguide devices in operation: linear waveguide configuration (top) and spiral configuration (bottom).
Absorbance dependence on the sample relative concentration; the waveguide cross-section schematic and top-view picture are provided as inserts.
(Color online) (a) Measured absorbance spectra of four dilute color solutions using a spectrophotometer; (b) Absorption levels measured using a spiral waveguide at a wavelength.
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