Plasmonic nanohole array for enhancing the SERS signal of a single layer of graphene in water
Abstract
In this study, we numerically design and experimentally test a SERS-active substrate for enhancing the SERS signal of a single layer of graphene (SLG) in water. The SLG is placed on top of an array of silver-covered nanoholes in a polymer and is covered with water. Here we report a large enhancement of up to 2×105 in the SERS signal of the SLG on the patterned plasmonic nanostructure for a 532nm excitation laser wavelength. We provide a detailed study of the light-graphene interactions by investigating the optical absorption in the SLG, the density of optical states at the location of the SLG, and the extraction efficiency of the SERS signal of the SLG. Our numerical calculations of both the excitation field and the emission rate enhancements support the experimental results. We find that the enhancement is due to the increase in the confinement of electromagnetic fields on the location of the SLG that results in enhanced light absorption in the graphene at the excitation wavelength. We also find that water droplets increase the density of optical radiative states at the location of the SLG, leading to enhanced spontaneous emission rate of graphene at its Raman emission wavelengths.
- Authors:
-
- Louisiana State Univ., Baton Rouge, LA (United States). School of Electrical Engineering and Computer Sciences and Center for Computation and Technology
- Intel Corp., Hillsboro, OR (United States)
- Univ. of Illinois, Urbana, IL (United States). Dept. of Electrical and Computer Engineering
- Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Mechanical and Industrial Engineering
- Publication Date:
- Research Org.:
- Louisiana State Univ., Baton Rouge, LA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Science Foundation (NSF); Louisiana Board of Regents
- OSTI Identifier:
- 1432833
- Grant/Contract Number:
- EE0007981; 1102301; 1254934; 1660233; LEQSF(2017-20)-RD-A-04; LEQSF(2017-18)-ENH-TR-08)
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 97 MATHEMATICS AND COMPUTING; 36 MATERIALS SCIENCE; optical sensors; Raman spectroscopy
Citation Formats
Mahigir, Amirreza, Chang, Te-Wei, Behnam, Ashkan, Liu, Gang Logan, Gartia, Manas Ranjan, and Veronis, Georgios. Plasmonic nanohole array for enhancing the SERS signal of a single layer of graphene in water. United States: N. p., 2017.
Web. doi:10.1038/s41598-017-14369-x.
Mahigir, Amirreza, Chang, Te-Wei, Behnam, Ashkan, Liu, Gang Logan, Gartia, Manas Ranjan, & Veronis, Georgios. Plasmonic nanohole array for enhancing the SERS signal of a single layer of graphene in water. United States. https://doi.org/10.1038/s41598-017-14369-x
Mahigir, Amirreza, Chang, Te-Wei, Behnam, Ashkan, Liu, Gang Logan, Gartia, Manas Ranjan, and Veronis, Georgios. Wed .
"Plasmonic nanohole array for enhancing the SERS signal of a single layer of graphene in water". United States. https://doi.org/10.1038/s41598-017-14369-x. https://www.osti.gov/servlets/purl/1432833.
@article{osti_1432833,
title = {Plasmonic nanohole array for enhancing the SERS signal of a single layer of graphene in water},
author = {Mahigir, Amirreza and Chang, Te-Wei and Behnam, Ashkan and Liu, Gang Logan and Gartia, Manas Ranjan and Veronis, Georgios},
abstractNote = {In this study, we numerically design and experimentally test a SERS-active substrate for enhancing the SERS signal of a single layer of graphene (SLG) in water. The SLG is placed on top of an array of silver-covered nanoholes in a polymer and is covered with water. Here we report a large enhancement of up to 2×105 in the SERS signal of the SLG on the patterned plasmonic nanostructure for a 532nm excitation laser wavelength. We provide a detailed study of the light-graphene interactions by investigating the optical absorption in the SLG, the density of optical states at the location of the SLG, and the extraction efficiency of the SERS signal of the SLG. Our numerical calculations of both the excitation field and the emission rate enhancements support the experimental results. We find that the enhancement is due to the increase in the confinement of electromagnetic fields on the location of the SLG that results in enhanced light absorption in the graphene at the excitation wavelength. We also find that water droplets increase the density of optical radiative states at the location of the SLG, leading to enhanced spontaneous emission rate of graphene at its Raman emission wavelengths.},
doi = {10.1038/s41598-017-14369-x},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {Wed Oct 25 00:00:00 EDT 2017},
month = {Wed Oct 25 00:00:00 EDT 2017}
}
Web of Science
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