Design of highly sensitive interferometric sensors based on subwavelength grating waveguides operating at the dispersion turning point

Huang, Tianye1,2; Xu, Guizhen1; Tu, Xin1; Zhang, Gangshun1; Lei, Rongrong1; Wu, Yiheng1; Pan, Jianxing1; Shao, Liyang3; Shum, Perry Ping1,3

2021-09-01

10.1364/JOSAB.430736

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS   影响因子和分区

0740-3224

1520-8540

In this paper, a dual-mode interferometric sensor based on a subwavelength grating (SWG) waveguide is proposed. The design operates at the dispersion turning point (DTP) of the two dispersive TE modes in the periodic structure, exhibiting a group velocity difference of almost zero, to improve the performance of refractive index (RI) sensors. The necessary conditions for realizing DTP in SWG are analyzed. Moreover, the interference spectrum characteristics and the influence of structural parameters on gas RI sensing performance are further studied. The results show that the sensitivity value of the proposed sensor can reach similar to 38.000 nm/RIU. The proposed structure can also achieve a gas pressure sensitivity of similar to 105 nm/MPa. The proposed sensors provide a potential platform for highly sensitive RI sensors. (C) 2021 Optical Society of America

SCI ; EI

英语

其他

National Natural Science Foundation of China[61905224] ; Wuhan Municipal Science and Technology Bureau[2018010401011297] ; Wuhan National Laboratory for Optoelectronics[2019WNLOKF005] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[1910491B06]

Optics

Optics

WOS:000692200200058

OPTICAL SOC AMER

20213610874226

Interferometry ; Refractive index ; Waveguides

Waveguides:714.3 ; Light/Optics:741.1 ; Optical Variables Measurements:941.4

PHYSICS

Web of Science

1.China Univ Geosci Wuhan, Sch Mech Engn & Elect Informat, Wuhan 430074, Peoples R China
2.Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen, Peoples R China

Huang, Tianye,Xu, Guizhen,Tu, Xin,et al. Design of highly sensitive interferometric sensors based on subwavelength grating waveguides operating at the dispersion turning point[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS,2021,38(9):2680-2686.

Huang, Tianye.,Xu, Guizhen.,Tu, Xin.,Zhang, Gangshun.,Lei, Rongrong.,...&Shum, Perry Ping.(2021).Design of highly sensitive interferometric sensors based on subwavelength grating waveguides operating at the dispersion turning point.JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS,38(9),2680-2686.

Huang, Tianye,et al."Design of highly sensitive interferometric sensors based on subwavelength grating waveguides operating at the dispersion turning point".JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 38.9(2021):2680-2686.