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Tunable long-range SPR device and method for detecting refractive index using the same

A refractive index and long-range technology, which is applied in the field of tuning long-range SPR devices and using the device to detect refractive index, can solve the problems of difficult practical application and slow response speed of sensors, and achieve large detection dynamic range, simple structure and fast response speed Effect

Inactive Publication Date: 2019-05-03
CHANGSHA UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The invention proposes a tuned long-range SPR device and a method for detecting the refractive index by using the device, which solves the defects of slow sensor response speed and difficulty in practical application in the prior art

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  • Tunable long-range SPR device and method for detecting refractive index using the same
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  • Tunable long-range SPR device and method for detecting refractive index using the same

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] In order to facilitate and clarify the description of the following examples, some terms are explained before describing the specific embodiments of the present invention in detail, and the following explanations apply to the specification and claims.

[0037] The SP that appears in the present invention is the abbreviation of Surface Plasmon, and its Chinese meaning is surface plasma; The SPR that appears herein is the abbreviation of Surface Plasmon Re...

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Abstract

The invention discloses a tunable long-range SPR device and a method for detecting the refractive index using the same. The device includes a laser, a lens, a prism, an LRSPR sensor chip, a detectionmedium layer, a unit photodetector, an adjustable voltage output device and a data processing system, wherein the LRSPR sensor chip sequentially includes an oxide conductive layer prepared on a bottomsurface of the prism, an external field modulation medium layer, a buffer medium layer, a metal functional layer, a surface modification layer and a sample cell, the adjustable voltage output deviceis controlled by the data processing system, the sample cell is used for accommodating the detection medium layer, the sample cell is set on at a lower surface of the surface modification layer, a gapis formed between the sample cell and the surface modification layer, and the liquid level of the detection medium layer is in contact with the lower surface of the surface modification layer. The device is advantaged in that device has a simple structure, can calculate the change of the refractive index of the detection medium layer by measuring signals of an external field, has the fast detection response speed and the large detection dynamic range, and improves practicality of the sensor.

Description

technical field [0001] The invention relates to the field of sensors and sensor technologies, in particular to a tuning long-range SPR device and a method for detecting refraction index using the device. Background technique [0002] Surface plasmon SP is a vibration mode formed by the collective oscillation of metal surface charges propagating along the interface between metal and dielectric; surface plasmon wave SPW exists on the medium interface of two kinds of dielectric constants with opposite signs (generally metal and dielectric), and propagate along metal surfaces. When the refractive index of the dielectric layers on both sides of the metal (i.e., the buffer dielectric layer and the detection dielectric layer) is the same and the thickness of the metal film is very small, in this case, the SPW generated simultaneously on the upper and lower surfaces of the metal film will overlap and degenerate and form a standing wave , causing the SPW to be divided into two modes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/41
Inventor 汪之又刘辉
Owner CHANGSHA UNIVERSITY
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