Sensitive label-free biosensing using critical modes in aperiodic photonic structures

Optics Express
Svetlana V Boriskina, Luca Dal Negro

Abstract

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.

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Citations

Jun 23, 2010·Proceedings of the National Academy of Sciences of the United States of America·Sylvanus Y LeeLuca Dal Negro
Dec 10, 2009·Optics Express·Jason J AmsdenFiorenzo G Omenetto
Jul 14, 2012·Reports on Progress in Physics·Enrique Maciá
Jan 19, 2010·Optics Letters·Carlo ForestiereLuca Dal Negro
Jan 1, 2017·Optical and Quantum Electronics·Moritz PaulsenMartina Gerken

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