Fig. 1 | Light: Science & Applications

Fig. 1

From: High-sensitivity nanophotonic sensors with passive trapping of analyte molecules in hot spots

Fig. 1

a Schematic of the sensor structure. The parameters w, d, and L represent the width of Al ribbons, the height of Ge ribbons and the width of nano-trenches, respectively. b Simulated electric near-field distribution of an exemplary resonator design with d = 200 nm, w = 1.4 μm, and L = 400 nm. c Reflection spectrum (red curve) of the resonators in b with the nano-trenches filled with an “imaginary” molecular species that have a single absorption line at ~1550 cm−1 (black curve). d Schematics depicting the underlying process of the molecule trapping functionality of the nano-trench structures

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