Figure 1From: Tunable Fabry-Pérot interferometer based on nanoporous anodic alumina for optical biosensing purposesSet of ESEM top view images of NAA samples (scale bar = 1 μm). (a) R-OSC(1) (L p = 5 μm, and d p = 30 nm). (b) R-OSC(2) (L p = 5 μm, and d p = 41 nm). (c) R-OSC(3) (L p = 5 μm, and d p = 52 nm). (d) R-OSC(4) (L p = 5 μm, and d p = 71 nm).Back to article page