Applied Optics (Early Posting) posted
04/10/2012
Distinguishing octane grades in gasoline using terahertz metamaterials
Jian Li, Zhen Tian, Yongyao
Chen, Wei Cao, and Zhoumo Zeng
Abstract:
Using single split-ring
resonator metamaterials, distinguishing octane numbers of commercial gasoline
is demonstrated experimentally by functioning at terahertz frequencies.
The differences in
frequency-dependent absorption coefficients and refractive indices of various
grades of gasoline lead to a modification in the surrounding dielectric
environment and consequently the resonance properties of the planar
metamaterials. This enables a distinct frequency shift in the
inductive-capacitive electric dipolar resonances. Results suggest that such
metamaterial arrays, as highly sensitive chemical sensors, have promising
potential in the petroleum industrial applications.
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