Fabrication-friendly polarization-sensitive plasmonic grating for optimal surface-enhanced Raman spectroscopy
Dutta, A., Nuutinen, T., Alam, K., Matikainen, A., Li, P., Hulkko, E., Toppari, J. J., Lipsanen, H., & Kang, G. (2020). Fabrication-friendly polarization-sensitive plasmonic grating for optimal surface-enhanced Raman spectroscopy. Journal of the European Optical Society : Rapid Publications, 16, Article 22. https://doi.org/10.1186/s41476-020-00144-5
Li, Peng |
© The Author(s). 2020
Plasmonic nanostructures are widely utilized in surface-enhanced Raman spectroscopy (SERS) from ultraviolet to near-infrared applications. Periodic nanoplasmonic systems such as plasmonic gratings are of great interest as SERS-active substrates due to their strong polarization dependence and ease of fabrication. In this work, we modelled a silver grating that manifests a subradiant plasmonic resonance as a dip in its reflectivity with significant near-field enhancement only for transverse-magnetic (TM) polarization of light. We investigated the role of its fill factor, commonly defined as a ratio between the width of the grating groove and the grating period, on the SERS enhancement. We designed multiple gratings having different fill factors using finite-difference time-domain (FDTD) simulations to incorporate different degrees of spectral detunings in their reflection dips from our Raman excitation (488 nm). Our numerical studies suggested that by tuning the spectral position of the optical resonance of the grating, via modifying their fill factor, we could optimize the achievable SERS enhancement. Moreover, by changing the polarization of the excitation light from transverse-magnetic to transverse-electric, we can disable the optical resonance of the gratings resulting in negligible SERS performance. To verify this, we fabricated and optically characterized the modelled gratings and ensured the presence of the desired detunings in their optical responses. Our Raman analysis on riboflavin confirmed that the higher overlap between the grating resonance and the intended Raman excitation yields stronger Raman enhancement only for TM polarized light. Our findings provide insight on the development of fabrication-friendly plasmonic gratings for optimal intensification of the Raman signal with an extra degree of control through the polarization of the excitation light. This feature enables studying Raman signal of exactly the same molecules with and without electromagnetic SERS enhancements, just by changing the polarization of the excitation, and thereby permits detailed studies on the selection rules and the chemical enhancements possibly involved in SERS. ...
Publication in research information system
MetadataShow full item record
Related funder(s)Research Council of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingThe reported research work was supported by National Natural Science Foundation of China (NSFC) (No. 61675020), Academy of Finland (Nos. 298298, 289947, 323995, 320166 and 320167), NP-Nano FidiPro by the Finnish Funding Agency for Innovation (TEKES) and NATO project (No. G5250).
Showing items with similar title or keywords.
Spatial localization of hotspots in Fano-resonant plasmonic oligomers for surface-enhanced coherent anti-Stokes Raman scattering Dutta, Arpan; Vartiainen, Erik M. (Springer, 2020)Realization of Fano resonance in plasmonic oligomers is often exploited to design efficient plasmonic substrates for surface-enhanced coherent anti-Stokes Raman scattering. Disk-type Fano-resonant plasmonic oligomers are ...
Plyushch, Alexander (2020)The work, presented in this thesis, focuses on studying graphene as a signal enhancing material for spectroscopic applications. Among many outstanding characteristics of graphene, it also exhibits attractive plasmonic ...
Kuisma, Mikael; Rousseaux, Benjamin; Czajkowski, Krzysztof M.; Rossi, Tuomas P.; Shegai, Timur; Erhart, Paul; Antosiewicz, Tomasz J. (American Chemical Society (ACS), 2022)Ultrastrong coupling (USC) is a distinct regime of light-matter interaction in which the coupling strength is comparable to the resonance energy of the cavity or emitter. In the USC regime, common approximations to quantum ...
Baieva, Svitlana (University of Jyväskylä, 2016)Miniaturization of optical elements and their integration to electronic circuits is limited by diffraction limit. It was realized that light being coupled to surface plasmons (SP) can overcome this limit. Employing also ...
Aptamer-Embedded DNA Origami Cage for Detecting (Glycated) Hemoglobin with a Surface Plasmon Resonance Sensor Duanghathaipornsuk, Surachet; Shen, Boxuan; Cameron, Brent D.; Ijäs, Heini; Linko, Veikko; Kostiainen, Mauri A.; Kim, Dong-Shik (Elsevier, 2020)DNA origami-based cages functionalized with aptamer motifs, were used to detect hemoglobin and glycated hemoglobin. The binding between the cages and hemoglobin was monitored using a surface plasmon resonance (SPR) sensor. ...