Cao Qipu, Feng Jijun, Lu Hongliang, Zhang Hui, Zhang Fuling, Zeng Heping
Opt Express. 2018 Sep 17;26(19):24614-24620. doi: 10.1364/OE.26.024614.
A hybrid integration of nanoporous gold with silicon nitride waveguide has been realized for surface-enhanced Raman spectroscopy (SERS) at 633-nm wavelength. The SERS signal is excited through 580-nm-thick T-shape suspended waveguides and collected through an objective lens. Raman spectra for different mesa width at either transverse electric (TE) or transverse magnetic (TM) mode are measured and compared. The localized surface plasmon resonance of the nanoporous gold can result in a waveguide and polarization-dependent SERS enhancement. The presented miniaturized SERS chips can work from visible to near-infrared wavelength and a wide application prospect could be expected.
已实现纳米多孔金与氮化硅波导的混合集成，用于633纳米波长的表面增强拉曼光谱（SERS）。SERS信号通过580纳米厚的T形悬浮波导激发，并通过物镜收集。测量并比较了横向电（TE）或横向磁（TM）模式下不同台面宽度的拉曼光谱。纳米多孔金的局域表面等离子体共振可导致波导和偏振相关的SERS增强。所展示的小型化SERS芯片可在可见光到近红外波长范围内工作，有望具有广泛的应用前景。
