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Perfect ultra-narrow band absorber based on lamellar structure for refractive index sensing
Author(s): Li Yu; Huixuan Gao; Shuwen Chu; Qiao Wang; Wei Peng
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Paper Abstract

In this paper, we theoretically investigate a tunable ultra-narrow band absorber consisting of lamellar structure in the near-infrared wavelength range. The absorption efficiency is 99.9% under normal incidence and the full width at half maximum (FWHM) is only 4nm. The high absorption is attributed to the surface plasmon resonance (SPR), which increases the interaction volume of the optical field. The ultra-narrow band absorber has a high refractive index sensitivity of 1208nm/RIU in a wide refractive index range of 1.33 to 1.40 and a high figure of merit of 302. Besides, the influence of structure parameters on the sensing performance are also investigated. Due to its easiness to be fabricated, the proposed structure has potential in sensing application.

Paper Details

Date Published: 20 December 2019
PDF: 6 pages
Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 1120935 (20 December 2019); doi: 10.1117/12.2548796
Show Author Affiliations
Li Yu, Dalian Univ. of Technology (China)
Huixuan Gao, Dalian Univ. of Technology (China)
Shuwen Chu, Dalian Univ. of Technology (China)
Qiao Wang, Dalian Univ. of Technology (China)
Wei Peng, Dalian Univ. of Technology (China)


Published in SPIE Proceedings Vol. 11209:
Eleventh International Conference on Information Optics and Photonics (CIOP 2019)
Hannan Wang, Editor(s)

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