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Sensor based on gold nanorod dimer array Fano resonance characteristics

A technology of gold nanorods and resonance characteristics, applied in the field of optical sensors, can solve the problems of resonance spectrum line width, large radiation damping, low quality factor of sensors with LSPR effect, etc., and achieve the effect of quality factor enhancement

Inactive Publication Date: 2014-09-24
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

[0003] However, the quality factor of sensors based on the LSPR effect of metal nanostructures is low. The reason is that the LSPR mode of metal nanostructures is mainly the oscillation of electrodes, the radiation damping is large, and the resonance spectrum linewidth

Method used

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  • Sensor based on gold nanorod dimer array Fano resonance characteristics
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  • Sensor based on gold nanorod dimer array Fano resonance characteristics

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Embodiment Construction

[0015] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0016] The sensor based on the gold nanorod dimer array provided by the invention has a structure such as figure 1 As shown: the gold nanorod dimers 1, 2, 3 and 4 are evenly arranged on the glass substrate 5, and the external medium is the detection environment (for example, it can be the air in the surrounding environment). The incident light is irradiated vertically on the glass surface from the external medium, and the distribution of the electric field is parallel to the short axis of the nanorod (y direction: Ey).

[0017] With the progress of modern micro-nano structure manufacturing technology, the preparation of metal micro-nano structure is more accurate and sophisticated, and its manufacturing accuracy can reach nm level, which provides the possibility for the successful preparation of this design. The preparation of this design adopts the electron b...

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Abstract

The invention provides a sensor based on gold nanorod dimer array Fano resonance characteristics. The sensor comprises a transparent substrate. The sensor is characterized in that two or more gold nanorod dimmers are arranged uniformly on the transparent substrate, and each gold nanorod dimer is formed by arranging two same gold nanorods in parallel. According to the sensor based on a gold nanorod dimer array structure of the invention, the Fano resonance characteristics of the array are utilized, and the sensing quality factor and the sensitivity are improved.

Description

Technical field [0001] The invention relates to an optical sensor. Background technique [0002] With the advancement of modern micro-nanostructure fabrication technology, localized surface plasmon resonance (LSPR) of metal nanostructures has become a research hotspot. The LSPR effect of metal nanostructures effectively combines optics and nanotechnology, greatly promoting the processing and transmission of optical signals at the nanoscale, and is widely used in the design and preparation of optical devices such as optical sensors and optical antennas, improving the integration of devices degree, increasing the miniaturization of the device. In particular, since the metal nanostructure LSPR spectrum is extremely sensitive to changes in the surrounding medium environment in the near field, it is extremely suitable for the preparation of high-sensitivity biochemical sensors. [0003] However, the quality factor of the sensor based on the LSPR effect of metal nanostructures i...

Claims

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Application Information

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IPC IPC(8): G01H9/00
Inventor 金杰刘菲吕辰刚
Owner TIANJIN UNIV
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