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Abstract
In order to overcome the existing challenges presented by conventional sensors, including their large size, a complicated preparation process, and difficulties filling the sensing media, a novel high-sensitivity plasmonic resonator sensor which is composed of two graphene-modified straight waveguides, two metallic layers, and a racetrack nanodisk resonator is proposed in this study. The transmission characteristics, which were calculated by the finite element theory, were used to further analyze the sensing properties. The results of quantitative analysis show that the proposed plasmonic sensor generates two resonance peaks for the different incident wavelengths, and both resonance peaks can be tuned by temperature. In addition, after optimizing the structural parameters of the resonator, the Q value and the refractive sensitivity reached 21.5 and 1666.67 nmRIU−1, respectively. Compared with other studies, these values translate to a better performance. Furthermore, a temperature sensitivity of 2.33 nm/5 °C was achieved, which allows the sensor to be easily applied to practical detection. The results of this study can broaden the useful range for a nanometer-scale temperature sensor with ultrafast real-time detection and resistance to electromagnetic interference.
Highlights
Surface plasmon polariton (SPP), allowing the compact storage of optical energy in electron oscillations at the interfaces of metals and dielectrics, has emerged as promising solution to overcome the barrier caused by the diffraction limit of light [1,2,3]
In athis study,nanodisk we illustrate theFurthermore, design of several a novel problems associated with the traditional sensor can be overcome by the proposed plasmonic high-sensitivity plasmonic resonator sensor, which is composed of two graphene-modified straight resonator sensor, because the SPP has superior capacity for optical nanoscale integration, and the waveguides, two metallic layers, and a racetrack nanodisk resonator
In order to enhance the sensitivity for temperature-sensing applications, a dielectric material with a high thermo-optic coefficient value is essential for the racetrack nanodisk resonator
Summary
Surface plasmon polariton (SPP), allowing the compact storage of optical energy in electron oscillations at the interfaces of metals and dielectrics, has emerged as promising solution to overcome the barrier caused by the diffraction limit of light [1,2,3]. With the continuous development in the plasmonic sensor field, advantages of small size, fast response, and resistance to electromagnetic interference have been sought This has increased the number of SPR sensor types, such as the refractive index sensor or micro temperature sensor [6,7]. In athis study,nanodisk we illustrate theFurthermore, design of several a novel problems associated with the traditional sensor can be overcome by the proposed plasmonic high-sensitivity plasmonic resonator sensor, which is composed of two graphene-modified straight resonator sensor, because the SPP has superior capacity for optical nanoscale integration, and the waveguides, two metallic layers, and a racetrack nanodisk resonator. Several problems sensing material (organic solution or mixture solution) can very easy fill the racetrack resonator by associated with the traditional sensor can be overcome by the proposed plasmonic resonator sensor, capillary attraction. Sensor Structure and Theoretical Analysis is 2–3 orders higher, simultaneously
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