SERS characteristics analysis of MDM metasurface grating

Mengze Qin; Zhibin Chen

doi:10.1117/12.2639325

29 April 2022 SERS characteristics analysis of MDM metasurface grating

Mengze Qin, Zhibin Chen

Author Affiliations +

Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 1225506 (2022) https://doi.org/10.1117/12.2639325
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China

Abstract

Metamaterials and metasurfaces have received wide attention because they exhibit excellent optical properties that natural materials do not possess, especially in refractive index biosensing, surface enhanced infrared absorption and surface enhanced Raman scattering. In this paper, a metal-dielectric-metal (MDM) metasurface grating SERS substrate structure was proposed. The perfect absorption characteristic of the metasurface is used to enhance the electric field of the dielectric layer, thereby generating an enhanced Raman signal. The absorbance of MDM metasurface grating was studied by finite difference time domain (FDTD) analysis. The optimal matching relationship between grating parameters was analysed. The optimal MDM metasurface grating structure was obtained when the wavelength of incident light was 785 nm. The MDM metasurface grating was prepared and its SERS performance was verified experimentally, proving that the SERS enhancement factor can reach 10⁴ .

Citation Download Citation

Mengze Qin and Zhibin Chen "SERS characteristics analysis of MDM metasurface grating", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 1225506 (29 April 2022); https://doi.org/10.1117/12.2639325

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