Fan-shaped nano-sensor capable of realizing Fano resonance
A nano-sensor, fan-shaped technology, applied in the field of nano-sensors, to achieve the effect of improving the scope of application
Active Publication Date: 2017-12-15
SHENZHEN UNIV
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Problems solved by technology
Studies have shown that people have a certain research basis for the Fano resonance in surface plasmons, but there are few reports on how to effectively adjust multiple Fano resonances (especially more than three Fano resonances). The development of metal surface plasmonic nanosensors with wider application range and higher performance provides great possibilities
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[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the content described here is only for illustrating and explaining the present invention, and is not intended to limit the present invention.
[0023] Such as figure 1 As shown, a fan-shaped nanosensor capable of realizing Fano resonance provided by an embodiment of the present invention includes a substrate 10 and nanostructures 20 arranged on the substrate 10 . Wherein, the material of the substrate 10 is glass, and the material of the nanostructure 20 is noble metal, such as gold or silver. In this embodiment, silver is taken as an example for illustration.
[0024] Such as figure 2 As shown, the nanostructure 20 includes a waveguide-cavity-waveguide structure surrounded by noble metals, a fan-lobe aggregate located in the cavity, and a single nanodisk located in the center of the fan-...
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The present invention discloses a fan-shaped nano-sensor capable of realizing Fano resonance, comprising a substrate and a nanostructure arranged on the substrate, wherein the nanostructure comprises: a cavity; an input waveguide and an output waveguide disposed oppositely on both sides of the cavity; a fan-flap assembly located in the cavity comprising a plurality of symmetrically distributed fan-flaps with the inner sides of all the fan flaps distributed on the same circumference and the outer sides of all the fan-flaps distributed on the same circumference; and a nano-disc located inside the fan-flip assembly. The offset distance from the centroid of the nano-disc to the input / output direction of the electromagnetic wave signal is adjustable so as to obtain sensors with different transmittances. The fan-shaped nano-sensor designed by using the principle of metal surface plasmon effect and capable of realizing Fano resonance has a simple structure, is convenient to manufacture, achieves high sensitivity and wide adjustment range, and is suitable for the detecting and monitoring in the fields of chemistry, medical treatment and environment.
Description
technical field [0001] The invention relates to the technical field of nanosensors, in particular to a fan-shaped nanosensor capable of realizing Fano resonance. Background technique [0002] Fano resonances have unique spectral line shapes, rich and variable coupling modes, and are usually accompanied by an unusually sharp spectral peak. The Fano resonance effect is an asymmetrical line type discovered by U.Fano in the study of atomic and molecular spectra in 1961. This is due to the overlapping of the separated state energy level and the continuous state energy band, resulting in quantum interference, which appears at a certain optical frequency. The zero absorption phenomenon is eliminated, resulting in an asymmetrical line shape of the spectrum. Fano resonance is usually accompanied by an unusually sharp spectral peak, which is very suitable for the modulation of optical effects. The modulated optical spectral lines generally show the characteristics of drastic changes ...
Claims
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Login to View More IPC IPC(8): G01D5/32B82Y40/00B82Y15/00
CPCB82Y15/00B82Y40/00G01D5/32
Inventor 王琼欧阳征标
Owner SHENZHEN UNIV