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Metamaterials application in sensing.

Chen T, Li S, Sun H - Sensors (Basel) (2012)

Bottom Line: Metamaterials are artificial media structured on a size scale smaller than wavelength of external stimuli, and they can exhibit a strong localization and enhancement of fields, which may provide novel tools to significantly enhance the sensitivity and resolution of sensors, and open new degrees of freedom in sensing design aspect.This paper mainly presents the recent progress concerning metamaterials-based sensing, and detailedly reviews the principle, detecting process and sensitivity of three distinct types of sensors based on metamaterials, as well as their challenges and prospects.Moreover, the design guidelines for each sensor and its performance are compared and summarized.

View Article: PubMed Central - PubMed

Affiliation: Mechanical & Power Engineering College, Harbin University of Science and Technology, Harbin 150080, China. chentao@hrbust.edu.cn

ABSTRACT
Metamaterials are artificial media structured on a size scale smaller than wavelength of external stimuli, and they can exhibit a strong localization and enhancement of fields, which may provide novel tools to significantly enhance the sensitivity and resolution of sensors, and open new degrees of freedom in sensing design aspect. This paper mainly presents the recent progress concerning metamaterials-based sensing, and detailedly reviews the principle, detecting process and sensitivity of three distinct types of sensors based on metamaterials, as well as their challenges and prospects. Moreover, the design guidelines for each sensor and its performance are compared and summarized.

No MeSH data available.


Related in: MedlinePlus

The structure of biosensing based on SRR array: (a) Top view of a microstrip transmission line and (b) Cross section of a microstrip transmission line with a pair SRRs and a schematic electromagnetic field distribution.
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f1-sensors-12-02742: The structure of biosensing based on SRR array: (a) Top view of a microstrip transmission line and (b) Cross section of a microstrip transmission line with a pair SRRs and a schematic electromagnetic field distribution.

Mentions: Recently, SRRs have been used for the fabrication of sensors and devices. For example, Lee et al. [41] proposed an SRR-based biosensor with a small electrical size to detect the occurrence of biomolecular binding. The structure of this biosensor consisted of two pairs of SRRs and a planar microwave transmission line, as shown in Figure 1. The planar microstrip transmission line produced a time-varying H-field component in a direction perpendicular to the surface of the SRRs. Moreover, the line was an open conduit for wave transmission and the electromagnetic field was not entirely confined to it. In addition, there existed a small E-field component along the axis of the line. Hence, the propagating mode of microwaves through the line was not a pure transverse electromagnetic (TEM) mode but a quasi-TEM mode, as shown in Figure 1(b). According to Faraday’s law, when a time-varying H-field component was perpendicular incident on the surface of SRR, the SRR will generate resonance. This was because the SRR can be considered to be a simple LC resonant circuit with a resonant frequency of f0 = 1/[2π(LC)]1/2. Based on the formula, the changes in resonant frequency depended on the changes in the inductance and/or capacitance.


Metamaterials application in sensing.

Chen T, Li S, Sun H - Sensors (Basel) (2012)

The structure of biosensing based on SRR array: (a) Top view of a microstrip transmission line and (b) Cross section of a microstrip transmission line with a pair SRRs and a schematic electromagnetic field distribution.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376603&req=5

f1-sensors-12-02742: The structure of biosensing based on SRR array: (a) Top view of a microstrip transmission line and (b) Cross section of a microstrip transmission line with a pair SRRs and a schematic electromagnetic field distribution.
Mentions: Recently, SRRs have been used for the fabrication of sensors and devices. For example, Lee et al. [41] proposed an SRR-based biosensor with a small electrical size to detect the occurrence of biomolecular binding. The structure of this biosensor consisted of two pairs of SRRs and a planar microwave transmission line, as shown in Figure 1. The planar microstrip transmission line produced a time-varying H-field component in a direction perpendicular to the surface of the SRRs. Moreover, the line was an open conduit for wave transmission and the electromagnetic field was not entirely confined to it. In addition, there existed a small E-field component along the axis of the line. Hence, the propagating mode of microwaves through the line was not a pure transverse electromagnetic (TEM) mode but a quasi-TEM mode, as shown in Figure 1(b). According to Faraday’s law, when a time-varying H-field component was perpendicular incident on the surface of SRR, the SRR will generate resonance. This was because the SRR can be considered to be a simple LC resonant circuit with a resonant frequency of f0 = 1/[2π(LC)]1/2. Based on the formula, the changes in resonant frequency depended on the changes in the inductance and/or capacitance.

Bottom Line: Metamaterials are artificial media structured on a size scale smaller than wavelength of external stimuli, and they can exhibit a strong localization and enhancement of fields, which may provide novel tools to significantly enhance the sensitivity and resolution of sensors, and open new degrees of freedom in sensing design aspect.This paper mainly presents the recent progress concerning metamaterials-based sensing, and detailedly reviews the principle, detecting process and sensitivity of three distinct types of sensors based on metamaterials, as well as their challenges and prospects.Moreover, the design guidelines for each sensor and its performance are compared and summarized.

View Article: PubMed Central - PubMed

Affiliation: Mechanical & Power Engineering College, Harbin University of Science and Technology, Harbin 150080, China. chentao@hrbust.edu.cn

ABSTRACT
Metamaterials are artificial media structured on a size scale smaller than wavelength of external stimuli, and they can exhibit a strong localization and enhancement of fields, which may provide novel tools to significantly enhance the sensitivity and resolution of sensors, and open new degrees of freedom in sensing design aspect. This paper mainly presents the recent progress concerning metamaterials-based sensing, and detailedly reviews the principle, detecting process and sensitivity of three distinct types of sensors based on metamaterials, as well as their challenges and prospects. Moreover, the design guidelines for each sensor and its performance are compared and summarized.

No MeSH data available.


Related in: MedlinePlus