Dielectric metalenses show intrinsic robustness to refractive index variations due to fixed zone boundaries that preserve the wavefront gradient, enabling stable focusing and quasi-scale-invariant behavior under scaling.
Measurements of the refractive indices and thermo -optic coefficients of Si 3N4 and SiO x using microring resonances
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Refractive Index Robustness of Metalenses
Dielectric metalenses show intrinsic robustness to refractive index variations due to fixed zone boundaries that preserve the wavefront gradient, enabling stable focusing and quasi-scale-invariant behavior under scaling.