Figure 2.

(a) Schematic of an imperfect CROW model with disordered waveguide widths W₁, W₂,…W_N and coupling gap widths g₁, g₂, … g_{N + 1}. Inset (i): Simulated cross-sectional view of the waveguide mode-field amplitude profile. (b) Modeled throughput- and drop-port transmission spectra of an imperfect CROW using transfer-matrix modeling. Green dashed line: reference wavelength λ₀ of 1555.82 nm. Red dashed line: probe wavelength λ_p of 1556.66 nm. (c) Modeled pixelized intensity patterns at eigenstates I–VIII. (d) Calculated library of the correlation coefficients ρ₁′–ρ₈′ as a function of Δn at λ₀. (e) Calculated library of the differential correlation coefficients as a function of Δn. (f) Calculated sensitivity as a function of probe wavelength. The red dashed line indicates a sensitivity of 306 RIU⁻¹ at 1556.66 nm.