In this paper, we introduce a novel approach for optical sensing based on the excitation of critically localized modes in two-dimensional deterministic aperiodic structures generated by a Rudin-Shapiro (RS) sequence. Based on a rigorous computational analysis, we demonstrate that RS photonic structures provide a large number of resonant modes better suited for sensing applications compared to traditional band-edge and defect-localized modes in periodic photonic structures. Finally, we show that enhanced sensitivity to refractive index variations as low as (delta)n=0.002 in RS structures results from the extended nature of critical modes and can enable the fabrication of novel label-free optical biosensors.
CITATION STYLE
Boriskina, S. V., & Dal Negro, L. (2008). Sensitive label-free biosensing using critical modes in aperiodic photonic structures. Optics Express, 16(17), 12511. https://doi.org/10.1364/oe.16.012511
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