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Figure 6
(a) Experimentally determined flux acceptances Aeff of the different waveguide channels and theoretical values assuming a lossless propagation within the waveguides. All available waveguide sizes (50 nm × 2 µm to 50 nm × 50 µm) were investigated. The incident beam was collimated horizontally using multiple slit openings (10–40 µm). (b) Estimation of the actual transmission efficiencies (Test) within the waveguide channels, using the flux acceptances measured at a collimation best matching the waveguide width.

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