Beilstein J. Nanotechnol.2019,10, 2459–2467, doi:10.3762/bjnano.10.236
, such as self-reference and multichannel sensing [25][26].
The generation of multiple Fano resonances is attributed to the existence of multiple discrete states. In most of the published papers, high-order modes are excited in the same cavity [23][28]. Discrete states are provided by different modes
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Figure 1:
Schematic diagram of an off-centered ring resonator (OCRR) side-coupled to the MDM waveguide. The i...
Beilstein J. Nanotechnol.2019,10, 247–255, doi:10.3762/bjnano.10.23
, Tianjin 300222, China 10.3762/bjnano.10.23 Abstract A magnetic-field sensor with self-reference characteristic based on metal–dielectric–metal (MDM) plasmonic waveguides and a magnetic fluid (MF) is proposed and theoretically investigated. Independent dual resonances are supported by the coupled
resonances on the external field, a magnetic-field sensor with self-reference characteristic is achieved. The magnetic-field nanosensor shows an excellent performance with a high sensitivity of 27 pm/Oe, i.e., 270 pm/mT. The proposed sensor takes advantage of the refractive-index tunability of the MF and the
compactness of the MDM waveguide structure. This research may open new opportunities to design nanoscale magnetic sensors with good performance.
Keywords: dual resonance; magnetic fluid; magnetic sensor; plasmonic waveguide; self-reference; surface plasmon polaritons; Introduction
Sensors that can detect
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Figure 1:
Schematic diagram of the MDM waveguide–resonator structure. The width of the waveguide is W and the...