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Nanoporous anodic alumina photonic crystals as effective medium platforms to control light–matter interactions for chemo- and biosensing applications. Schemes of representative NAA-PC structures: NAA-FPI—Fabry–Pérot interferometer; NAA-μCV—optical microcavity; NAA-APO-GIF—apodized gradient index filter; NAA-GIF—gradient index filter; NAA-DBR—distributed Bragg reflector.
