Photonics Research, 2020, 8 (2): 02000103, Published Online: Jan. 7, 2020  

Facilitated tip-enhanced Raman scattering by focused gap-plasmon hybridization Download: 620次

Author Affiliations
1 Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
2 Tianjin Union Medical Center, Tianjin 300121, China
3 e-mail: cjmin@szu.edu.cn
4 e-mail: xcyuan@szu.edu.cn
Abstract
Tip-enhanced Raman scattering (TERS) spectroscopy is a nondestructive and label-free molecular detection approach that provides high sensitivity and nanoscale spatial resolution. Therefore, it has been used in a wide array of applications. We demonstrate a gap-plasmon hybridization facilitated by a bottom-illuminated TERS configuration. The gap-plasmon hybridization effect is first performed with the finite-difference time-domain method to optimize the parameters, and experiments are then conducted to calibrate the performance. The results demonstrate an enhancement factor of 1157 and a spatial resolution of 13.5 nm. The proposed configuration shows great potential in related surface imaging applications in various fields of research.

Houkai Chen, Yuquan Zhang, Yanmeng Dai, Changjun Min, Siwei Zhu, Xiaocong Yuan. Facilitated tip-enhanced Raman scattering by focused gap-plasmon hybridization[J]. Photonics Research, 2020, 8(2): 02000103.

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