Artificial surface plasmon-based polarization sensor

A polarization sensor, localized surface plasmon technology, applied in the direction of electromagnetic field characteristics, etc., to achieve the effect of easy manufacturing, lower operating frequency, and a wide range of product applications
CN106526337AInactive Publication Date: 2017-03-22NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2017-03-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention belongs to the metamaterial sensor technical field and provides a polarization sensor structure for realizing sensor functions in microwave low frequency bands, in particular an artificial surface plasmon-based polarization sensor. The artificial surface plasmon-based polarization sensor is characterized in that: subwavelength periodic trenches are formed in an ultra-thin metal cylindrical structure; the trenches are filled with dielectric materials; the dielectric constants of the materials are uniform; the depths of the trenches in the cylinder are different; the center of a cylindrical portion with no trenches formed inside does not overlap with the center of the structure of the whole cylinder; when electromagnetic waves enter the surface of the structure, a probe at one side of the structure can detect different field intensities for the electromagnetic waves which enter the structure from different directions, so that the function of the sensor can be realized. The sensor has the advantages of simple manufacture, low cost and high economic efficiency.
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Description

technical field

[0001] The invention relates to a polarization sensor structure, in particular to a polarization sensor based on artificial surface plasmons. Background technique

[0002] In general, localized surface plasmon resonance refers to a localized electromagnetic wave mode bound on the metal surface, which is a resonance phenomenon of conduction electrons generated at the interface of positive and negative dielectric constants under the excitation of incident light. , generally confined near the metal-dielectric interface, can form an enhanced near-field effect. However, because the plasma frequency of metals is generally in the ultraviolet band, in the microwave band, electromagnetic waves are difficult to penetrate, and metals approximately behave as ideal conductors. Under these conditions, the metal surface cannot excite localized surface plasmons. In recent years, in order to introduce the concept of localized surface plasmons to low frequencies (far infrare...

Claims

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