Abstract

We numerically investigate the optical properties of a spiral G-shaped metamaterial, which exhibits both a sharp resonance with a high-quality factor and a broad resonance with a long linear slope in the near-infrared region. By employing the sharp resonating mode, refractive index sensing with sensitivity up to $410\mathrm{nm}/\mathrm{RIU}$ is demonstrated theoretically. In addition, the metamaterial shows single wavelength sensing ability, which allows fast determination of environmental refractive index changes as large as 0.5 by simply monitoring variations in the transmitted intensity of a certain wavelength, which will be beneficial to the development of refractive index sensors based on monochromatic light sources and detectors. As the resonances are independent of the polarization direction of a linearly polarized wave, the sensor manufacturing process will benefit as a result of the lack of an alignment requirement for the axis of polarizers with the metamaterials’ orientation.

© 2013 Optical Society of America

Surface plasmon resonance optical cavity enhanced refractive index sensing

A. Giorgini, S. Avino, P. Malara, G. Gagliardi, M. Casalino, G. Coppola, M. Iodice, P. Adam, K. Chadt, J. Homola, and P. De Natale
Opt. Lett. 38(11) 1951-1953 (2013)

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

Fei Cheng, Xiaodong Yang, and Jie Gao
Opt. Lett. 39(11) 3185-3188 (2014)

Metal-substrate-enhanced magnetic dipole resonance in metamaterials for high-performance refractive index sensing

Bo Liu, Chaojun Tang, Jing Chen, Ningyan Xie, Jun Yuan, Huang Tang, and Xiaoqin Zhu
Opt. Mater. Express 8(7) 2008-2016 (2018)

High Q-factor terahertz metamaterial for superior refractive index sensing

M. Askari, H. Pakarzadeh, and F. Shokrgozar
J. Opt. Soc. Am. B 38(12) 3929-3936 (2021)

Flexible terahertz metamaterials for dual-axis strain sensing

Jining Li, Charan M. Shah, Withawat Withayachumnankul, Benjamin S.-Y. Ung, Arnan Mitchell, Sharath Sriram, Madhu Bhaskaran, Shengjiang Chang, and Derek Abbott
Opt. Lett. 38(12) 2104-2106 (2013)