Research Article demonstrates air-gap Bragg reflectors in microtubular structures, suggesting new optical applications.
Bioinspired Air-gap Self-rolled Bragg Reflectors Some of nature´s vibrant visual appearances arise from optical multilayers with air-gap regions. In their Research Article (10.1002/adpr.202500332), Esteban Bermúdez-Ureña and Ullrich Steiner draw inspiration from these natural photonic architectures to fabricate microtubular optical structures with air-gap distributed Bragg reflectors using a thin film self-rolling technique. Multimode optical structures with varying SiO2/air-gap bilayers and air-gap spacings are demonstrated.
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Bermúdez-Ureña et al. (2026) studied this question.
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