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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

(a) Reflection of FSS of symmetric (dashed line) and asymmetric DSRs with φ = 4° for a perfect conductor (dotted line) and for gold (solid line); (b) The E-field in the resonator plane shows a strong concentration (white) at the ends of the arcs. f = 875 GHz, amplitude of excitation 1 V/m [48].
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f4-sensors-12-02742: (a) Reflection of FSS of symmetric (dashed line) and asymmetric DSRs with φ = 4° for a perfect conductor (dotted line) and for gold (solid line); (b) The E-field in the resonator plane shows a strong concentration (white) at the ends of the arcs. f = 875 GHz, amplitude of excitation 1 V/m [48].

Mentions: When the terahertz biosensor was excited with free space radiation, the reflection of the terahertz sensor showed two significant features, as shown in Figure 4(a). A broad maximum at 1,090 GHz is observed, where the length of each arc of the aDSR approximately matches half the wavelength. This dipole with antenna-like behavior shows up for the symmetric DSR (φ = 0°) and is not significantly affected by a small angle φ. By increasing the angle φ > 0°, the two arcs of the DSR become differently long. Around 875 GHz, the reflection of this asymmetric case showed a strong and sharp modulation of 13 dB over 13 GHz. Outside the 3 dB ranges a flank with a very high steepness of 7 dB over 4 GHz was maintained for a FSS made from gold. Moreover, it was interesting to observe that at this steep flank the electric field concentrated strongly close to the ring with amplitudes of 25 times higher than the excitation Einc, as shown in Figure 4(b). Therefore, the high sensitivity terahertz sensors were typically based on resonant structures whose frequency response was shifted by dielectric loading. Such a frequency shift can depend very sensitively on the dielectric properties of material placed in the environment of such a structure.


Metamaterials application in sensing.

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

(a) Reflection of FSS of symmetric (dashed line) and asymmetric DSRs with φ = 4° for a perfect conductor (dotted line) and for gold (solid line); (b) The E-field in the resonator plane shows a strong concentration (white) at the ends of the arcs. f = 875 GHz, amplitude of excitation 1 V/m [48].
© Copyright Policy
Related In: Results  -  Collection

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

f4-sensors-12-02742: (a) Reflection of FSS of symmetric (dashed line) and asymmetric DSRs with φ = 4° for a perfect conductor (dotted line) and for gold (solid line); (b) The E-field in the resonator plane shows a strong concentration (white) at the ends of the arcs. f = 875 GHz, amplitude of excitation 1 V/m [48].
Mentions: When the terahertz biosensor was excited with free space radiation, the reflection of the terahertz sensor showed two significant features, as shown in Figure 4(a). A broad maximum at 1,090 GHz is observed, where the length of each arc of the aDSR approximately matches half the wavelength. This dipole with antenna-like behavior shows up for the symmetric DSR (φ = 0°) and is not significantly affected by a small angle φ. By increasing the angle φ > 0°, the two arcs of the DSR become differently long. Around 875 GHz, the reflection of this asymmetric case showed a strong and sharp modulation of 13 dB over 13 GHz. Outside the 3 dB ranges a flank with a very high steepness of 7 dB over 4 GHz was maintained for a FSS made from gold. Moreover, it was interesting to observe that at this steep flank the electric field concentrated strongly close to the ring with amplitudes of 25 times higher than the excitation Einc, as shown in Figure 4(b). Therefore, the high sensitivity terahertz sensors were typically based on resonant structures whose frequency response was shifted by dielectric loading. Such a frequency shift can depend very sensitively on the dielectric properties of material placed in the environment of such a structure.

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