Abstract

Highly sensitive and miniaturized sensors are highly desirable for real-time analyte/sample detection. In this Letter, we propose a highly sensitive plasmonic sensing scheme with the miniaturized photonic crystal fiber (PCF) attributes. A large cavity is introduced in the first ring of the PCFs for the efficient field excitation of the surface plasmon polariton mode and proficient infiltration of the sensing elements. Due to the irregular air-hole diameter in the first ring, the cavity exhibits the birefringence behavior which enhances the sensing performance. The novel plasmonic material gold has been used considering the chemical stability in an aqueous environment. The guiding properties and the effects of the sensing performance with different parameters have been investigated by the finite element method, and the proposed PCFs have been fabricated using the stack-and-draw fiber drawing method. The proposed sensor performance was investigated based on the wavelength and amplitude sensing techniques and shows the maximum sensitivities of 11,000 nm/RIU and $\mathrm{1,420}{\mathrm{RIU}}^{-1}$, respectively. It also shows the maximum sensor resolutions of $9.1\times {10}^{-6}$ and $7\times {10}^{-6}\mathrm{RIU}$ for the wavelength and amplitude sensing schemes, respectively, and the maximum figure of merits of 407. Furthermore, the proposed sensor is able to detect the analyte refractive indices in the range of 1.33–1.42; as a result, it will find the possible applications in the medical diagnostics, biomolecules, organic chemical, and chemical analyte detection.

© 2018 Optical Society of America

Highly amplitude-sensitive photonic-crystal-fiber-based plasmonic sensor

Firoz Haider, Rifat Ahmmed Aoni, Rajib Ahmed, and Andrey E. Miroshnichenko
J. Opt. Soc. Am. B 35(11) 2816-2821 (2018)

Highly sensitive double D-shaped channel photonic crystal fiber based plasmonic refractive index sensor

M. Ifaz Ahmad Isti, M. Hussayeen Khan Anik, Samiha Nuzhat, Rubel Chandra Talukder, Sadia Sultana, Shovasis Kumar Biswas, and Hriteshwar Talukder
Opt. Continuum 1(3) 575-590 (2022)

Highly sensitive dual-core photonic crystal fiber based on a surface plasmon resonance sensor with a silver nano-continuous grating

Shengxi Jiao, Sanfeng Gu, Hanrui Yang, Hairui Fang, and Shibo Xu
Appl. Opt. 57(28) 8350-8358 (2018)

D-shaped photonic crystal fiber plasmonic refractive index sensor based on gold grating

Junjie Lu, Yan Li, Yanhua Han, Yi Liu, and Jianmin Gao
Appl. Opt. 57(19) 5268-5272 (2018)

Practical sensing approach based on surface plasmon resonance in a photonic crystal fiber

Xue Zhou, Tonglei Cheng, Shuguang Li, Takenobu Suzuki, and Yasutake Ohishi
OSA Continuum 1(4) 1332-1340 (2018)