A novel chemical sensor using metamaterial absorber for methanol sensing aplications

¹ Defense Key Disciplines Lab of Novel Micro-nano Devices and System Technology，Chongqing University, Chongqing, China
² International R & D center of Micro-nano Systems and New Materials Technology，Chongqing University, Chongqing, China
³ Key Laboratory of Optoelectronic Technology & Systems, Ministry of Education, Chongqing University, Chongqing, China
⁴ Institute of High Performance Computing, Agency for Science, Technology and Research, Singapore

Published: 21 July 2017 by MDPI in The 7th International Multidisciplinary Conference on Optofluidics 2017 session Silicon photonics

https://doi.org/10.3390/optofluidics2017-04412

Abstract:

This paper presents a novel chemical sensor using a metamaterial absorber, which is composed of an Au Bottom layer, a microfluidic channel, a FR4 substrate and a split-square-cross-resonator (SSCR). The resonance generated by SSCR is extraordinarily sensitive to changes of the effective dielectric constant around the capacitive gap. Furthermore, the effective dielectric constant of the dielectric substrate is under the influence of microfluidic channels by using an infinitesimal quantity of a liquid. The proposed sensor exhibits an outstanding sensitivity by a creative SSCR structure and the Au Bottom layer. In addition, the relationship between the absorption frequency and chemical concentration is demonstrated by simulation.

Keywords: metamaterial, sensor , chemical sensing

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