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Comparison of free-space and waveguide-based SERS platforms

Nina Turk (UGent) , Ali Raza (UGent) , Pieter Wuytens (UGent) , Hans Demol (UGent) , Michiel Van Daele (UGent) , Christophe Detavernier (UGent) , Andre Skirtach (UGent) , Kris Gevaert (UGent) and Roel Baets (UGent)
(2019) NANOMATERIALS. 9(10).
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Abstract
Surface-Enhanced Raman Spectroscopy (SERS) allows for the highly specific detection of molecules by enhancing the inherently weak Raman signals near the surface of plasmonic nanostructures. A variety of plasmonic nanostructures have been developed for SERS signal excitation and collection in a conventional free-space microscope, among which the gold nanodomes offer one of the highest SERS enhancements. Nanophotonic waveguides have recently emerged as an alternative to the conventional Raman microscope as they can be used to efficiently excite and collect Raman signals. Integration of plasmonic structures on nanophotonic waveguides enables reproducible waveguide-based excitation and collection of SERS spectra, such as in nanoplasmonic slot waveguides. In this paper, we compare the SERS performance of gold nanodomes, in which the signal is excited and collected in free space, and waveguide-based nanoplasmonic slot waveguide. We evaluate the SERS signal enhancement and the SERS background of the different SERS platforms using a monolayer of nitrothiophenol. We show that the nanoplasmonic slot waveguide approaches the gold nanodomes in terms of the signal-to-background ratio. We additionally demonstrate the first-time detection of a peptide monolayer on a waveguide-based SERS platform, paving the way towards the SERS monitoring of biologically relevant molecules on an integrated lab-on-a-chip platform.
Keywords
Raman spectroscopy, SERS, photonic integrated circuit, waveguide-based SERS, nanoplasmonic slot waveguide, gold nanodomes, peptide detection, ENHANCED RAMAN-SPECTROSCOPY, NANOSPHERE-LITHOGRAPHY, GOLD SURFACES, SCATTERING, EXCITATION, ANTENNAS, COLLECTION, RESONANCES, PLASMONS, SPECTRA

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Please use this url to cite or link to this publication:

MLA
Turk, Nina, et al. “Comparison of Free-Space and Waveguide-Based SERS Platforms.” NANOMATERIALS, vol. 9, no. 10, 2019.
APA
Turk, N., Raza, A., Wuytens, P., Demol, H., Van Daele, M., Detavernier, C., … Baets, R. (2019). Comparison of free-space and waveguide-based SERS platforms. NANOMATERIALS, 9(10).
Chicago author-date
Turk, Nina, Ali Raza, Pieter Wuytens, Hans Demol, Michiel Van Daele, Christophe Detavernier, Andre Skirtach, Kris Gevaert, and Roel Baets. 2019. “Comparison of Free-Space and Waveguide-Based SERS Platforms.” NANOMATERIALS 9 (10).
Chicago author-date (all authors)
Turk, Nina, Ali Raza, Pieter Wuytens, Hans Demol, Michiel Van Daele, Christophe Detavernier, Andre Skirtach, Kris Gevaert, and Roel Baets. 2019. “Comparison of Free-Space and Waveguide-Based SERS Platforms.” NANOMATERIALS 9 (10).
Vancouver
1.
Turk N, Raza A, Wuytens P, Demol H, Van Daele M, Detavernier C, et al. Comparison of free-space and waveguide-based SERS platforms. NANOMATERIALS. 2019;9(10).
IEEE
[1]
N. Turk et al., “Comparison of free-space and waveguide-based SERS platforms,” NANOMATERIALS, vol. 9, no. 10, 2019.
@article{8634741,
  abstract     = {Surface-Enhanced Raman Spectroscopy (SERS) allows for the highly specific detection of molecules by enhancing the inherently weak Raman signals near the surface of plasmonic nanostructures. A variety of plasmonic nanostructures have been developed for SERS signal excitation and collection in a conventional free-space microscope, among which the gold nanodomes offer one of the highest SERS enhancements. Nanophotonic waveguides have recently emerged as an alternative to the conventional Raman microscope as they can be used to efficiently excite and collect Raman signals. Integration of plasmonic structures on nanophotonic waveguides enables reproducible waveguide-based excitation and collection of SERS spectra, such as in nanoplasmonic slot waveguides. In this paper, we compare the SERS performance of gold nanodomes, in which the signal is excited and collected in free space, and waveguide-based nanoplasmonic slot waveguide. We evaluate the SERS signal enhancement and the SERS background of the different SERS platforms using a monolayer of nitrothiophenol. We show that the nanoplasmonic slot waveguide approaches the gold nanodomes in terms of the signal-to-background ratio. We additionally demonstrate the first-time detection of a peptide monolayer on a waveguide-based SERS platform, paving the way towards the SERS monitoring of biologically relevant molecules on an integrated lab-on-a-chip platform.},
  articleno    = {1401},
  author       = {Turk, Nina and Raza, Ali and Wuytens, Pieter and Demol, Hans and Van Daele, Michiel and Detavernier, Christophe and Skirtach, Andre and Gevaert, Kris and Baets, Roel},
  issn         = {2079-4991},
  journal      = {NANOMATERIALS},
  keywords     = {Raman spectroscopy,SERS,photonic integrated circuit,waveguide-based SERS,nanoplasmonic slot waveguide,gold nanodomes,peptide detection,ENHANCED RAMAN-SPECTROSCOPY,NANOSPHERE-LITHOGRAPHY,GOLD SURFACES,SCATTERING,EXCITATION,ANTENNAS,COLLECTION,RESONANCES,PLASMONS,SPECTRA},
  language     = {eng},
  number       = {10},
  pages        = {14},
  title        = {Comparison of free-space and waveguide-based SERS platforms},
  url          = {http://dx.doi.org/10.3390/nano9101401},
  volume       = {9},
  year         = {2019},
}

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