Figure 3.

(a) Modeled pixelized patterns at probe wavelength λ_p (1556.66 nm) upon the buffer solution and the test solution. (b) Calculated sets of correlation coefficients upon the buffer solution and the test solution. The dotted-line boxes indicate ρ^p and the dashed-line boxes indicate ρ^s. (c) A zoom-in view of the calibrated ρ₅′ and ρ₄′ as a function of Δn and the extracted Δn_B, Δn_B′ and Δn.