20 February 2017 Optical coupling effects on the performance of 3D SERS bio-sensors
Author Affiliations +
While a wide range of substrate formats have been proposed for surface enhanced Raman scattering (SERS) applications, the challenge remains in designing a reproducible high efficiency SERS substrate [1]. In part, this is due to the disconnect between the local field enhancement spectra and the localized surface plasmon resonance (LSPR) spectra commonly used to characterize SERS substrates [2]. It remains a challenge to directly evaluate the sensor performance. In this work, we report a systematic study of optical coupling in SERS substrates by measuring the sensor performance across the visible and near-infrared spectral range. Using the experimental SERS scattering cross section measurements of two distinct peaks we compute the best-fit curve for the field enhancement. Using the field enhancement profile we calculate the full sensor performance maps for both Stokes and anti-Stokes shifts and evaluate the optimal pump laser wavelengths for SERS spectroscopy application.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Polyakov, A. Polyakov, A. Rogacs, A. Rogacs, "Optical coupling effects on the performance of 3D SERS bio-sensors", Proc. SPIE 10112, Photonic and Phononic Properties of Engineered Nanostructures VII, 101120T (20 February 2017); doi: 10.1117/12.2250436; https://doi.org/10.1117/12.2250436

Back to Top