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http://dx.doi.org/10.3807/KJOP.2016.27.6.229

Differential Transmission Spectra of Terahertz Metamaterial Resonances for Sensing Microorganisms  

Park, S.J. (Department of Physics and Department of Energy Systems Research, Ajou University)
Ahn, Y.H. (Department of Physics and Department of Energy Systems Research, Ajou University)
Publication Information
Korean Journal of Optics and Photonics / v.27, no.6, 2016 , pp. 229-232 More about this Journal
Abstract
Metamaterials operating in the terahertz frequency range show promising potential for use in highly sensitive microbial sensors that are capable of effectively detecting microorganisms in the ambient environment. We were able to detect extremely small numbers of microorganisms by measuring the differential transmission spectra (DTS) of the metamaterial resonances. This was possible because their sizes are on the same scale as the microgaps of the terahertz metamaterials. DTS depend critically on the number of microorganisms placed in the gap area, and their dielectric constant. In addition, these metamaterial microbial sensors are reusable, because the microorganisms can be completely removed by fungicide solution. Finite-difference time-domain simulations successfully reproduce our experimental data.
Keywords
Terahertz Spectroscopy; Subwavelength structures; Metamaterial;
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Times Cited By KSCI : 1  (Citation Analysis)
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7 S. J. Park, S. W. Jun, A. R. Kim, and Y. H. Ahn, "Terahertz metamaterial sensing on polystyrene microbeads: Shape dependence," Opt. Mater. Express 5, 2150-2155 (2015).   DOI