Surface-enhanced coherent anti-Stokes Raman scattering at metal-metal and metal-dielectric nanojunctions

Shamsul Abedin; Hui Xia; Victor Esch; S.R.J. Brueck; Eric O. Potma

doi:10.1117/12.2609930

7 March 2022 Surface-enhanced coherent anti-Stokes Raman scattering at metal-metal and metal-dielectric nanojunctions

Shamsul Abedin, Hui Xia, Victor Esch, S.R.J. Brueck, Eric O. Potma

Proceedings Volume PC11965, Multiphoton Microscopy in the Biomedical Sciences XXII; PC119650N (2022) https://doi.org/10.1117/12.2609930
Event: SPIE BiOS, 2022, San Francisco, California, United States

Abstract

Combining coherent anti-Stokes Raman scattering(CARS) with the surface-enhancement effects afforded by plasmonic resonances can probe molecular vibrations down to the single-molecule limit. Recent advances have been encouraging, yet, there are difficulties associated with the reproducibility of these measurements. Here, we present controllable and repeatable wide-field surface-enhanced CARS (SECARS) measurements at metal film-metal particle and metal film-dielectric particle nanojunctions. We demonstrate CARS signal at metal-metal junctions using the lowest average power densities to date. We also show reproducible SECARS measurements at metal-dielectric heterojunctions, opening the possibility of SECARS sensors not constrained by lossy and fragile metallic antenna systems.

Conference Presentation

Citation Download Citation

Shamsul Abedin, Hui Xia, Victor Esch, S.R.J. Brueck, and Eric O. Potma "Surface-enhanced coherent anti-Stokes Raman scattering at metal-metal and metal-dielectric nanojunctions", Proc. SPIE PC11965, Multiphoton Microscopy in the Biomedical Sciences XXII, PC119650N (7 March 2022); https://doi.org/10.1117/12.2609930

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