Ultrawide-detection-range refractive index sensor based on a two-dimensional mirror-image photonic crystal microcavity
Guo Sheng,
Kang She,
Lin Li
et al.
Abstract:In this work, a refractive index sensor is theoretically proposed based on a two-dimensional mirror-image SiO2/Si photonic crystal microcavity. The introduction of mirror-image microcavity effectively enhances the light localization and the coupling between light and liquid analyte. Results show that the sensor exhibits a high near-linear sensitivity of 493.5 nm/RIU with a narrow full-width at half-maximum of ~ 20 nm in a broad refractive index range of 1.0 ~ 1.5. Moreover, the detection resolution for the min… Show more
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