Abstract
Plasmonic grating sensors, which can achieve ultrafast response and real-time sample detection, as well as mitigate the electromagnetic interference, is a major research area in nanooptical sensors. In this article, we propose an integrated temperature/refractive sensor based on a plasmonic periodic grating with resonance peaks that can be tuned by the structural parameters. It is composed of optical fiber substrate, InGaAsP semiconductor material, Ag periodic grating, and surface monolayer graphene from bottom to top and the temperature sensing solution is filled on the top of the grating. According to quantitative analysis, the structural parameters, and the reflectance spectrum, the sensitivity of the proposed temperature sensor can reach 0.455 nm/°C or 1625 nmRIU−1. In addition, the operating wavelength can be tuned by structural parameters in the optical communication wavelengths; as a result, the application in integrated optical fiber sensing and biological measurements can be broadened.
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