Facilitated tip-enhanced Raman scattering by focused gap-plasmon hybridization
作者： Houkai Chen , Yuquan Zhang , Yanmeng Dai , Changjun Min , Siwei Zhu
DOI: 10.1364/PRJ.8.000103
关键词: Scanning probe microscopy 、 Scanning tunneling microscope 、 Materials science 、 Plasmon 、 Raman scattering 、 Transformation optics 、 Image resolution 、 Nanoscopic scale 、 Spectroscopy 、 Optoelectronics
摘要: Tip-enhanced Raman scattering (TERS) spectroscopy is a nondestructive and label-free molecular detection approach that provides high sensitivity nanoscale spatial resolution. Therefore, it has been used in wide array of applications. We demonstrate gap-plasmon hybridization facilitated by bottom-illuminated TERS configuration. The effect first performed with the finite-difference time-domain method to optimize parameters, experiments are then conducted calibrate performance. results an enhancement factor 1157 resolution 13.5 nm. proposed configuration shows great potential related surface imaging applications various fields research.
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