Cargando…
Tip-Enhanced Raman Spectroscopy Based on Spiral Plasmonic Lens Excitation
In this study, we proposed the idea of replacing the traditional objective lens in bottom-illumination mode with a plasmonic lens (PL) to achieve tip-enhanced Raman spectroscopy (TERS). The electric field energy of surface plasmon polaritons (SPPs) of the spiral PL was found to be more concentrated...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9371167/ https://www.ncbi.nlm.nih.gov/pubmed/35957194 http://dx.doi.org/10.3390/s22155636 |
_version_ | 1784767053781008384 |
---|---|
author | Gu, Kai Sun, Ming Zhang, Yang |
author_facet | Gu, Kai Sun, Ming Zhang, Yang |
author_sort | Gu, Kai |
collection | PubMed |
description | In this study, we proposed the idea of replacing the traditional objective lens in bottom-illumination mode with a plasmonic lens (PL) to achieve tip-enhanced Raman spectroscopy (TERS). The electric field energy of surface plasmon polaritons (SPPs) of the spiral PL was found to be more concentrated at the focal point without any sidelobe using the finite-difference time domain (FDTD) method compared with that of a symmetry-breaking PL. This property reduces far-field background noise and increases the excitation efficiency of the near-field Raman signal. The disadvantage of only the near-field Raman scattering of samples at the center of the structure being detected when using an ordinary PL in TERS is overcome by using our proposed method of changing only the polarization of the incident light. |
format | Online Article Text |
id | pubmed-9371167 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-93711672022-08-12 Tip-Enhanced Raman Spectroscopy Based on Spiral Plasmonic Lens Excitation Gu, Kai Sun, Ming Zhang, Yang Sensors (Basel) Article In this study, we proposed the idea of replacing the traditional objective lens in bottom-illumination mode with a plasmonic lens (PL) to achieve tip-enhanced Raman spectroscopy (TERS). The electric field energy of surface plasmon polaritons (SPPs) of the spiral PL was found to be more concentrated at the focal point without any sidelobe using the finite-difference time domain (FDTD) method compared with that of a symmetry-breaking PL. This property reduces far-field background noise and increases the excitation efficiency of the near-field Raman signal. The disadvantage of only the near-field Raman scattering of samples at the center of the structure being detected when using an ordinary PL in TERS is overcome by using our proposed method of changing only the polarization of the incident light. MDPI 2022-07-28 /pmc/articles/PMC9371167/ /pubmed/35957194 http://dx.doi.org/10.3390/s22155636 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Gu, Kai Sun, Ming Zhang, Yang Tip-Enhanced Raman Spectroscopy Based on Spiral Plasmonic Lens Excitation |
title | Tip-Enhanced Raman Spectroscopy Based on Spiral Plasmonic Lens Excitation |
title_full | Tip-Enhanced Raman Spectroscopy Based on Spiral Plasmonic Lens Excitation |
title_fullStr | Tip-Enhanced Raman Spectroscopy Based on Spiral Plasmonic Lens Excitation |
title_full_unstemmed | Tip-Enhanced Raman Spectroscopy Based on Spiral Plasmonic Lens Excitation |
title_short | Tip-Enhanced Raman Spectroscopy Based on Spiral Plasmonic Lens Excitation |
title_sort | tip-enhanced raman spectroscopy based on spiral plasmonic lens excitation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9371167/ https://www.ncbi.nlm.nih.gov/pubmed/35957194 http://dx.doi.org/10.3390/s22155636 |
work_keys_str_mv | AT gukai tipenhancedramanspectroscopybasedonspiralplasmoniclensexcitation AT sunming tipenhancedramanspectroscopybasedonspiralplasmoniclensexcitation AT zhangyang tipenhancedramanspectroscopybasedonspiralplasmoniclensexcitation |