Tunable transmission of a normal incidence through a double-slab structure

Abstract

In this work, a double-slab structure is proposed, in which one slab is made of near-zero-real-part-of-impedance metamaterial (NZRPIM), and the other slab is made of ordinary transparent material. We shall demonstrate that, when a beam of electromagnetic wave is normally incident into the double-slab structure, the transmission may be enhanced significantly due to existence of a cross term induced by coherent superposition between forward and backward waves arising in the NZRPIM slab, thus the corresponding transmission peak may be strongly affected by the other slab and fluid arising between the two slabs, which is instructive significance for the design and application of high sensitivity refractive index sensor based on electromagnetic wave intensity detection. Our work may provide a new possible way to design and manufacture sensors by using NZRPIM.

KEYWORDS:

• Metamaterial
• transmission
• refractive index sensors

PACS:

• 41.20.Jb
• 03.50.De
• 78.20.Ci

Acknowledgements

The authors would like to thank Tianyi Xue for his contribution in addressing manufacturable NZRPIM.

Disclosure statement

No potential conflict of interest was reported by the author(s).