Nanostructured dielectric surfaces for Raman spectroscopy: design and thermal analysis
conference paper
In this paper, an all-dielectric metasurface for surface enhanced Raman spectroscopy (SERS) is presented. The proposed design constitutes of an array of silicon (Si) dimers on top of thin film of silicon nitride (SiN), deposited on a glass substrate. The coupling mechanism between the dimers is based on two orthogonal guided waves in the SiN film. These guided modes lead to a strong separation between excitation and emitted Raman signal in the waveguide. The new design is compared to a previously published dielectric design with a gold backing mirror. The comparison takes into account manufacturability, field enhancement and thermal aspects. This shows that the all-dielectric design has about seven times less power dissipation but the enhancement factor is about 20 times smaller.
Topics
TNO Identifier
871876
ISSN
0277786X
ISBN
9781510628533
Publisher
SPIE
Article nr.
110802U
Source title
Proceedings Metamaterials, Metadevices, and Metasystems 2019, 11-15 August 2019, San Diego, CA, USA
Collation
4 p.
Files
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