Visualizing the optical field strengths in Au/dielectric nanostructures and its correlation to SERS enhancements

Y. Rajesh; L. D.Varma Sangani; Ummar Pasha Shaik; Anshu Gaur; Md Ahamad Mohiddon; M. Ghanashyam Krishna

doi:10.1063/1.4980546

Visualizing the optical field strengths in Au/dielectric nanostructures and its correlation to SERS enhancements

Y. Rajesh
, L. D.Varma Sangani
, Ummar Pasha Shaik
, Anshu Gaur
, Md Ahamad Mohiddon^*
, M. Ghanashyam Krishna

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The role of dielectric surrounding over the Au nanostructure for surface plasmon resonance (SPR) behavior is investigated by scanning near field optical microscopy (SNOM). The observed optical field strengths are correlated with the surface enhanced Raman scattering (SERS) enhancement recorded for R6G molecule. Discontinuous nanostructured Au thin films are deposited by RF magnatron sputtering at very low rate on to three different dielectric substrates, ZnO, TiO₂ and SiO₂. These three Au/dielectric nanostructures are investigated using SNOM by illuminating it in near field and collecting in transmission far field configuration. The observed optical near field images of the three different nanostructures are discussed by taking their dielectric constant into the account. The SERS enhancements are correlated with the optical field strengths derived from the near field optical imaging.

Original language	English
Title of host publication	DAE Solid State Physics Symposium 2016
Editors	Surendra Singh, Saibal Basu, Shovit Bhattacharya, Amitabh Das
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735415003
DOIs	https://doi.org/10.1063/1.4980546
State	Published - 19 May 2017
Externally published	Yes

Publication series

Name	AIP Conference Proceedings
Volume	1832
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Bibliographical note

Publisher Copyright:
© 2017 Author(s).

Keywords

Plasmons
R6G
Scanning Near field optical microscopy
SERS

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1063/1.4980546

Cite this

Rajesh, Y., Sangani, L. D. V., Shaik, U. P., Gaur, A., Mohiddon, M. A., & Krishna, M. G. (2017). Visualizing the optical field strengths in Au/dielectric nanostructures and its correlation to SERS enhancements. In S. Singh, S. Basu, S. Bhattacharya, & A. Das (Eds.), DAE Solid State Physics Symposium 2016 Article 080086 (AIP Conference Proceedings; Vol. 1832). American Institute of Physics Inc.. https://doi.org/10.1063/1.4980546

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title = "Visualizing the optical field strengths in Au/dielectric nanostructures and its correlation to SERS enhancements",

abstract = "The role of dielectric surrounding over the Au nanostructure for surface plasmon resonance (SPR) behavior is investigated by scanning near field optical microscopy (SNOM). The observed optical field strengths are correlated with the surface enhanced Raman scattering (SERS) enhancement recorded for R6G molecule. Discontinuous nanostructured Au thin films are deposited by RF magnatron sputtering at very low rate on to three different dielectric substrates, ZnO, TiO2 and SiO2. These three Au/dielectric nanostructures are investigated using SNOM by illuminating it in near field and collecting in transmission far field configuration. The observed optical near field images of the three different nanostructures are discussed by taking their dielectric constant into the account. The SERS enhancements are correlated with the optical field strengths derived from the near field optical imaging.",

keywords = "Plasmons, R6G, Scanning Near field optical microscopy, SERS",

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doi = "10.1063/1.4980546",

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Rajesh, Y, Sangani, LDV, Shaik, UP, Gaur, A, Mohiddon, MA & Krishna, MG 2017, Visualizing the optical field strengths in Au/dielectric nanostructures and its correlation to SERS enhancements. in S Singh, S Basu, S Bhattacharya & A Das (eds), DAE Solid State Physics Symposium 2016., 080086, AIP Conference Proceedings, vol. 1832, American Institute of Physics Inc. https://doi.org/10.1063/1.4980546

Visualizing the optical field strengths in Au/dielectric nanostructures and its correlation to SERS enhancements. / Rajesh, Y.; Sangani, L. D.Varma; Shaik, Ummar Pasha et al.
DAE Solid State Physics Symposium 2016. ed. / Surendra Singh; Saibal Basu; Shovit Bhattacharya; Amitabh Das. American Institute of Physics Inc., 2017. 080086 (AIP Conference Proceedings; Vol. 1832).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Mohiddon, Md Ahamad

AU - Krishna, M. Ghanashyam

PY - 2017/5/19

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N2 - The role of dielectric surrounding over the Au nanostructure for surface plasmon resonance (SPR) behavior is investigated by scanning near field optical microscopy (SNOM). The observed optical field strengths are correlated with the surface enhanced Raman scattering (SERS) enhancement recorded for R6G molecule. Discontinuous nanostructured Au thin films are deposited by RF magnatron sputtering at very low rate on to three different dielectric substrates, ZnO, TiO2 and SiO2. These three Au/dielectric nanostructures are investigated using SNOM by illuminating it in near field and collecting in transmission far field configuration. The observed optical near field images of the three different nanostructures are discussed by taking their dielectric constant into the account. The SERS enhancements are correlated with the optical field strengths derived from the near field optical imaging.

AB - The role of dielectric surrounding over the Au nanostructure for surface plasmon resonance (SPR) behavior is investigated by scanning near field optical microscopy (SNOM). The observed optical field strengths are correlated with the surface enhanced Raman scattering (SERS) enhancement recorded for R6G molecule. Discontinuous nanostructured Au thin films are deposited by RF magnatron sputtering at very low rate on to three different dielectric substrates, ZnO, TiO2 and SiO2. These three Au/dielectric nanostructures are investigated using SNOM by illuminating it in near field and collecting in transmission far field configuration. The observed optical near field images of the three different nanostructures are discussed by taking their dielectric constant into the account. The SERS enhancements are correlated with the optical field strengths derived from the near field optical imaging.

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KW - R6G

KW - Scanning Near field optical microscopy

KW - SERS

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AN - SCOPUS:85020260134

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A2 - Singh, Surendra

A2 - Basu, Saibal

A2 - Bhattacharya, Shovit

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PB - American Institute of Physics Inc.

ER -

Rajesh Y, Sangani LDV, Shaik UP, Gaur A, Mohiddon MA, Krishna MG. Visualizing the optical field strengths in Au/dielectric nanostructures and its correlation to SERS enhancements. In Singh S, Basu S, Bhattacharya S, Das A, editors, DAE Solid State Physics Symposium 2016. American Institute of Physics Inc. 2017. 080086. (AIP Conference Proceedings). doi: 10.1063/1.4980546

Visualizing the optical field strengths in Au/dielectric nanostructures and its correlation to SERS enhancements

Abstract

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Keywords

ASJC Scopus subject areas

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