Enhancement of molecular coherent anti-Stokes Raman scattering with silicon nano-antennas
| Autor: | Shamsul Abedin, Yong Li, Abid Anjum Sifat, Khokan Roy, Eric O. Potma |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Chemical Physics (physics.chem-ph)
Silicon Mechanical Engineering FOS: Physical sciences Physics::Optics Bioengineering General Chemistry Surface Plasmon Resonance Spectrum Analysis Raman Condensed Matter Physics Nanostructures Physics - Chemical Physics General Materials Science Optics (physics.optics) Physics - Optics |
| Popis: | Surface-enhanced coherent anti-Stokes Raman scattering (SE-CARS) takes advantage of surface plasmon resonances supported on metallic nanostructures to amplify the coherent Raman response of target molecules. While these metallic antennas have found significant success in SE-CARS studies, photo-induced morphological changes to the nanoantenna under ultrafast excitation introduce significant hurdles in terms of stability and reproducilibty. These hurdles need to be overcome in order to establish SE-CARS as a reliable tool for rapid biomolecular sensing. Here we address this challenge by performing molecular CARS measurements enhanced by nanoantennas made from high-index dielectric particles with more favorable thermal properties. We present the first experimental demonstration of enhanced molecular CARS signals observed at Si nano-antennas, which offer much improved thermal stability compared to their metallic counterparts. 15 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|