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Opt Express. 2011 Apr 25;19(9):8815-20. doi: 10.1364/OE.19.008815.

A periodically coupled plasmon nanostructure for refractive index sensing.

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Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, New Mexico 88003-8001, USA.


We present unique characteristics of subwavelength surface plasmon polaritons in a periodically coupled nanowell structure. The nanowell structure offers high quality internal surface plasmon resonance for sensing applications. Calculated FWHM of the transmission peak is 6 nm and the optical transmission is close to 100% at the resonant wavelength of 815.8 nm. The highly concentrated polaritons in the nanowell are sensitive to surface changes providing a sensitivity of 4800% RIU(-1) for optical sensing applications.

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