Abstract

We design and theoretically investigate a surface-enhanced Raman scattering (SERS) sensor based on the hybrid plasmonic grating slot waveguide. The sensor is formed by combining a dielectric deep slot waveguide and a metallic grating slot waveguide. The proposed sensor exhibits a high field enhancement with a maximum enhancement factor of 7580.9 at the wavelength of 785 nm, revealing that the electric field in such hybrid plasmonic grating slot waveguide can be extremely strengthened. To better characterize the performance of the sensor in the SERS application, the total normalized volumetric enhancement factor (TNVEF) is proposed, which is determined by both the ${|E|^4}$-approximation-based volumetric field enhancement and Raman scattered light collection efficiency. The TNVEF is utilized to characterize the influences of the structural parameters on the sensor and further optimize the sensing structure. Such on-chip SERS sensor can be integrated with a micro-laser and a micro-multiplexer on a photonic platform to realize an all-integrated on-chip SERS detection system.

© 2020 Optical Society of America

Surface-enhanced Raman scattering sensor based on hybrid deep slot waveguide on an integrated photonic platform

Shiyu Li, Li Xia, Xin Chen, Zhao Yang, and Wei Li
J. Opt. Soc. Am. B 36(9) 2423-2428 (2019)

Compact hybrid plasmonic slot waveguide sensor with a giant enhancement factor for surface-enhanced Raman scattering application

Suoming Wang, Yanying Zhu, Sijie Luo, Erkuang Zhu, and Shuqing Chen
Opt. Express 29(16) 24765-24778 (2021)

Theoretical investigation of SERS nanosensors based on hybrid waveguides made of metallic slots and dielectric strips

Feng Tang, Pierre-Michel Adam, and Salim Boutami
Opt. Express 24(19) 21244-21255 (2016)

Surface-enhanced Raman spectroscopy long-range detection investigation based on the alternating coupling of a surface plasmonic array and dielectric waveguide

Chunhong Lai, Zhijun Zhang, Xiaoming Jiang, Jing Wen, Cheng Zeng, and Yuanrui Li
Appl. Opt. 62(15) 3976-3981 (2023)

Hybrid plasmonic slot waveguide with a metallic grating for on-chip biosensing applications

S. Hadi Badri, Sanam SaeidNahaei, and Jong Su Kim
Appl. Opt. 60(25) 7828-7833 (2021)