Journal
IEEE JOURNAL OF QUANTUM ELECTRONICS
Volume 56, Issue 1, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JQE.2019.2946839
Keywords
Optical waveguides; Plasmons; Electric fields; Optical surface waves; Gold; Laser excitation; Surface waves; Free-space excitation; integrated optics; on-chip sensors; plasmonic slot waveguide; surface-enhanced Raman spectroscopy
Categories
Funding
- Fonds Wetenschappelijk Onderzoek (FWO) Belgium
- National Natural Science Foundation of China [61535010]
- China Scholarship Council
Ask authors/readers for more resources
We report a novel on-chip approach for surface-enhanced Raman spectroscopy (SERS) using a plasmonic slot waveguide. The Raman signal is excited via free-space excitation and is collected by the waveguide. A significant improvement of the signal-to-background-ratio (SBR), as compared to the case of back-scattered Raman spectroscopy with waveguide-mode excitation, is demonstrated using a silicon nitride plasmonic slot waveguide with a 7-mm access waveguide. The flexible adjustment of the incident angle in free space and modification of waveguide geometry enables the further optimization of the pump-to-Stokes conversion efficiency. The combination of high SBR and long access waveguide allows the integration with additional photonics devices (sources, filters, spectrometers) on the same chip.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
