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Sensors 2014, 14(1), 272-282; doi:10.3390/s140100272
Article

Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial

1
, 2
, 1,*  and 1
Received: 12 November 2013; in revised form: 13 December 2013 / Accepted: 16 December 2013 / Published: 24 December 2013
(This article belongs to the Section Physical Sensors)
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Abstract: We study the presence of dark and bright modes in a planar metamaterial with a double rod unit cell introducing geometric asymmetry in rod lengths. The dark mode displays a Fano-type resonance with a sharp asymmetric profile, rendering it far more sensitive than the bright mode to slight variations of the dielectric environment. This peculiar feature may envisage the possible application of the asymmetric dimer metamaterial as an optical sensor for chemical or biological analysis, provided that the effect of material losses on the dark mode quality factor is properly taken into account.
Keywords: metamaterials; Fano resonance; dimer sensor metamaterials; Fano resonance; dimer sensor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Omaghali, N.E.J.; Tkachenko, V.; Andreone, A.; Abbate, G. Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial. Sensors 2014, 14, 272-282.

AMA Style

Omaghali NEJ, Tkachenko V, Andreone A, Abbate G. Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial. Sensors. 2014; 14(1):272-282.

Chicago/Turabian Style

Omaghali, Ndubuisi E.J.; Tkachenko, Volodymyr; Andreone, Antonello; Abbate, Giancarlo. 2014. "Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial." Sensors 14, no. 1: 272-282.



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