| Autor: |
Mohr, Daniel A., Yoo, Daehan, Chen, Che, Li, Mo, Oh, Sang-Hyun |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Optics Express 26, 23540-23549 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1364/OE.26.023540 |
| Popis: |
Waveguide-integrated plasmonics is a growing field with many innovative concepts and demonstrated devices in the visible and near-infrared. Here, we extend this body of work to the mid-infrared for the application of surface-enhanced infrared absorption (SEIRA), a spectroscopic method to probe molecular vibrations in small volumes and thin films. Built atop a silicon-on-insulator (SOI) waveguide platform, two key plasmonic structures useful for SEIRA are examined using computational modeling: gold nanorods and coaxial nanoapertures. We find resonance dips of 80% in near diffraction-limited areas due to arrays of our structures and up to 40% from a single resonator. Each of the structures are evaluated using the simulated SEIRA signal from poly(methyl methacrylate) and an octadecanethiol self-assembled monolayer. The platforms we present allow for a compact, on-chip SEIRA sensing system with highly efficient waveguide coupling in the mid-IR. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
