Self-referenced refractive index sensor based on double-dips method with bimetal-dielectric and double-groove grating | Zendy

Maolin Zhao | Zendy; Junxian Wang | Zendy; Yizhuo Zhang | Zendy; Mengfan Ge | Zendy; Pengyu Zhang | Zendy; Jian Shen | Zendy; Chaoyang Li | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Self-referenced refractive index sensor based on double-dips method with bimetal-dielectric and double-groove grating

Author(s) -

Maolin Zhao,

Junxian Wang,

Yizhuo Zhang,

Mengfan Ge,

Pengyu Zhang,

Jian Shen,

Chaoyang Li

Publication year - 2022

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.454344

Subject(s) - grating , optics , materials science , refractive index , surface plasmon resonance , figure of merit , groove (engineering) , prism , surface plasmon , localized surface plasmon , surface plasmon polariton , resonance (particle physics) , sensitivity (control systems) , plasmon , optoelectronics , physics , nanotechnology , nanoparticle , engineering , particle physics , electronic engineering , metallurgy

Self-referenced refractive index sensors allow more accurate measurements and reduce the influence of extraneous factors. This work proposed a high-sensitivity, self-referenced surface plasmon resonance sensor with Na grating and Au-ZnS composite grating. When Transverse Magnetic-polarized light is incident into the prism, three surface plasmon resonances are excited at the interface of Na-MgF 2 grating and Au-ZnS grating. The first one is treated as the reference angle, the second and third are forward and backward surface plasmon resonance, respectively. Using the angular modulation, the single-dip sensitivities are 329.41 deg/RIU and 788.24 deg/RIU in the range of 1.330-1.347. To further improve the performance of the sensor, the double-dips method is adopted, and the average sensitivity in the range of 1.330-1.347 is 1117.65 deg/RIU, while the maximum reaches 4390 deg/RIU. Due to high sensitivity, a good figure of merit can be obtained even with a larger full width at half maximum of 3.30°. This proposed sensor provides potential application in the research of biomolecular detection and chemical testing.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research