Background-free metamaterial sensor based on resonant asymmetric transmission
Source abstract
Abstract
Abstract We theoretically report that asymmetric transmission phenomenon of linearly polarized light enables an ultrasensitive and background-free metamaterial sensor with a sensitivity of 47.5 THz/RIU in the optical range. The asymmetric transmission in the metamaterial arises from the twist arrangement of two cascaded ring apertures and its asymmetric factor can reach 0.47. Importantly, by detecting the direction-dependent polarization conversion, the metamaterial is capable of sensing refractive index of surrounding medium. The sensing principle dictated by cross-polarization makes the sensor background-free since co-polarization background noise is easily removed. The proposed metamaterial may open up opportunities to develop novel sensors and polarization modulators in the optical regime.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metamaterials and Metasurfaces Applications · Plasmonic and Surface Plasmon Research · Orbital Angular Momentum in Optics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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