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Nanomaterials 2018, 8(6), 418; https://doi.org/10.3390/nano8060418

Polarization- and Angular-Resolved Optical Response of Molecules on Anisotropic Plasmonic Nanostructures

Faculty of Mathematics and Physics, Institute of Physics, Charles University, 121 16 Prague 2, Czech Republic
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Received: 10 May 2018 / Revised: 28 May 2018 / Accepted: 7 June 2018 / Published: 9 June 2018
(This article belongs to the Special Issue Metallic Nanostructures)
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Abstract

A sometimes overlooked degree of freedom in the design of many spectroscopic (mainly Raman) experiments involve the choice of experimental geometry and polarization arrangement used. Although these aspects usually play a rather minor role, their neglect may result in a misinterpretation of the experimental results. It is well known that polarization- and/or angular- resolved spectroscopic experiments allow one to classify the symmetry of the vibrations involved or the molecular orientation with respect to a smooth surface. However, very low detection limits in surface-enhancing spectroscopic techniques are often accompanied by a complete or partial loss of this detailed information. In this review, we will try to elucidate the extent to which this approach can be generalized for molecules adsorbed on plasmonic nanostructures. We will provide a detailed summary of the state-of-the-art experimental findings for a range of plasmonic platforms used in the last ~ 15 years. Possible implications on the design of plasmon-based molecular sensors for maximum signal enhancement will also be discussed. View Full-Text
Keywords: SERS; Raman; plasmonics; metallic nanostructures; polarization and angular dependences; molecular orientation; ellipsometry SERS; Raman; plasmonics; metallic nanostructures; polarization and angular dependences; molecular orientation; ellipsometry
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Šubr, M.; Procházka, M. Polarization- and Angular-Resolved Optical Response of Molecules on Anisotropic Plasmonic Nanostructures. Nanomaterials 2018, 8, 418.

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