Optical coupling effects on the performance of 3D SERS bio-sensors

A. Polyakov; A. Rogacs

doi:10.1117/12.2250436

20 February 2017 Optical coupling effects on the performance of 3D SERS bio-sensors

A. Polyakov, A. Rogacs

Proceedings Volume 10112, Photonic and Phononic Properties of Engineered Nanostructures VII; 101120T (2017) https://doi.org/10.1117/12.2250436
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

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.

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Citation Download Citation

A. Polyakov and 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); https://doi.org/10.1117/12.2250436

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