Cavity-Enhanced Spectroscopy in Condensed Phases: Recent Literature and Remaining Challenges

Figure 7

(a) Schematic of the microring resonator adjacent to the fluid channel placed on top. The color-scaled image in (b) depicts the electric field profile propagating within the waveguide when an aqueous sample is loaded within the device. (c) Optical microscope images of the ring resonator, waveguide, and fluidic chip. Note that the completed device in (d) incorporates 50 closely spaced waveguides and resonators. Figure reproduced from Nitkowski et al. [42].

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