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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 11 — Jun. 1, 2014
  • pp: 3185–3188

Enhancing intensity and refractive index sensing capability with infrared plasmonic perfect absorbers

Fei Cheng, Xiaodong Yang, and Jie Gao  »View Author Affiliations

Optics Letters, Vol. 39, Issue 11, pp. 3185-3188 (2014)

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An infrared refractive index sensor based on plasmonic perfect absorbers for glucose concentration sensing is experimentally demonstrated. Utilizing substantial absorption contrast between a perfect absorber ( 98 % at normal incidence) and a non-perfect absorber upon the refractive index change, a maximum value of figure of merit ( FOM * ) about 55 and a bulk wavelength sensitivity about 590 nm / RIU are achieved. The demonstrated sensing platform provides great potential in improving the performance of plasmonic refractive index sensors and developing future surface enhanced infrared spectroscopy.

© 2014 Optical Society of America

OCIS Codes
(300.6340) Spectroscopy : Spectroscopy, infrared
(160.3918) Materials : Metamaterials
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Remote Sensing and Sensors

Original Manuscript: April 2, 2014
Revised Manuscript: April 21, 2014
Manuscript Accepted: April 22, 2014
Published: May 23, 2014

Fei Cheng, Xiaodong Yang, and Jie Gao, "Enhancing intensity and refractive index sensing capability with infrared plasmonic perfect absorbers," Opt. Lett. 39, 3185-3188 (2014)

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